Office Event Planning Made Simple: A Guide for PAs, EAs & Team Admins
Stop chasing RSVPs across email, Slack, and spreadsheets. One link, instant headcounts, and automatic reminders for every team event.
You're the person who makes things happen. The offsite wouldn't get booked without you. The Christmas party wouldn't have a venue. The team drinks wouldn't have a headcount. But organising office events is rarely in your job description — it's just something that lands on your desk because you're reliable, organised, and people trust you to get it done.
The problem isn't the events themselves. It's the admin: chasing RSVPs across three different channels, updating a spreadsheet that nobody else touches, and trying to give the caterer a final number when half the team hasn't replied. If this sounds familiar, there's a better way.
The Pain Every Office Coordinator Knows
Organising office events shouldn't feel like a second job. But it does.
"Are you coming to the offsite?" — asked 47 times
You send an email, a Slack message, and a calendar invite. Half the team replies to one, a quarter replies to another, and the rest say nothing. You still don't know numbers on the day.
Spreadsheets that nobody updates
You create a shared Google Sheet for the Christmas party. Three people fill it in. You chase the other 80 by email. Someone deletes a row by accident. Classic.
Headcount chaos for catering and venues
The restaurant needs final numbers by Friday. It's Thursday evening and you've got 12 confirmed out of 40 invited. You order for 35 and hope for the best.
Hours lost on admin that isn't your actual job
You're an EA, PA, or office manager — not a full-time event planner. But somehow every team drinks, workshop, and away day lands on your desk.
How Who's In Makes Office Events Effortless
Who's In is a free RSVP tool that replaces the spreadsheet-email-Slack chase with a single link. Create an event, share the link, and watch the headcount update in real time.
One Link, Instant RSVPs
Create an event in 60 seconds. Share a single link via email, Slack, Teams, or WhatsApp. Colleagues tap "I'm In" — no login, no app, no friction. You get a real-time headcount.
Automatic Waitlists
Venue holds 30? Set the cap. When it fills, a waitlist kicks in. Someone drops out at 4pm? The next person gets bumped up and notified automatically. No chasing required.
Reminders That Actually Work
Automatic email reminders go out before the event so people don't forget. Reduces no-shows without you having to send "friendly reminder" messages to the whole office.
CSV Export for Catering & Venues
Download the attendee list as a CSV. Hand it to the caterer, the venue, or your manager. Names, emails, dietary notes — all in one clean export.
Works Where Your Team Already Is
Drop the link into Slack, Microsoft Teams, email, or WhatsApp. No new tool to roll out, no IT approval needed, no training sessions. It just works.
QR Code Check-In
Print or display a QR code at the venue entrance. Attendees scan to check in. You get a live view of who's actually arrived — perfect for fire safety lists.
Every Type of Office Event, Sorted
Whether it's Friday drinks or the annual offsite, Who's In handles it. Here's what teams are using it for:
Team Drinks & Socials
Friday drinks, pub quiz night, summer rooftop, leaving do
Set capacity to venue limit — automatic waitlist handles overflow
Christmas & Holiday Parties
Office Christmas party, Secret Santa, New Year gathering
Add dietary requirements to the RSVP form for catering
Offsites & Away Days
Team offsite, strategy day, quarterly planning, board retreat
Use the items-to-bring field for what to prepare or pack
Workshops & Lunch-and-Learns
Skill share, guest speaker, product demo, brown bag session
Cap at room capacity — waitlist auto-promotes when someone drops out
Celebrations & Milestones
Work anniversaries, promotions, team wins, birthdays
Use guest RSVP so people don't need to create an account
Wellness & Team Building
Office yoga, step challenge, volunteering day, sports day
Set up recurring events for weekly wellness sessions
Welcome & Farewell Events
New joiner lunch, farewell drinks, intern welcome
Share the link in your team Slack or WhatsApp group
Informal Gatherings
Pizza Friday, coffee catch-up, board game night, movie screening
No sign-up needed for guests — one tap and they're in
Before & After: The Christmas Party
Here's what organising the office Christmas party looks like with and without a proper RSVP tool:
| Task | Old Way | With Who's In |
|---|---|---|
| Send invitations | Email blast + Slack post + calendar invite | Share one link in any channel |
| Collect RSVPs | Chase replies across 3 platforms for 2 weeks | Real-time headcount updates automatically |
| Manage dietary needs | Reply-all thread with allergies buried in emails | Collected at RSVP time, exported as CSV |
| Handle capacity | "We only have 60 spots" — manually track in spreadsheet | Auto-cap at 60 with waitlist |
| Send reminders | "Friendly reminder" email you have to write yourself | Automatic reminders sent before the event |
| Provide final numbers | Count spreadsheet rows at 11pm the night before | Real-time dashboard, export anytime |
| Time spent on admin | 6-8 hours across 3 weeks | Under 30 minutes total |
Real Scenario: Monthly Team Drinks
Sarah is an EA at a tech company with 120 people across three floors. She organises monthly Friday drinks at a nearby bar. Here's her workflow with Who's In:
Monday: Create the event
Takes 60 seconds. Title, date, venue, capacity of 50 (bar's limit). Done.
Monday: Share the link
Drops the link in the #social Slack channel and the office WhatsApp group. One message, two channels.
Wednesday: Check the dashboard
32 confirmed, 6 on the waitlist. No chasing needed — she can see exactly who's coming.
Thursday: Auto-reminder goes out
Everyone who RSVP'd gets a reminder email. Two people cancel — waitlist auto-promotes the next two.
Friday: Show up and enjoy
Sarah knows exactly who's coming. The bar knows the numbers. Job done in under 10 minutes total.
AI Agent Ready
Who's In is the world's first event platform that AI assistants like ChatGPT, Claude, and Gemini can actually use. Your team can ask their AI assistant "What office events are happening this week?" and get instant answers with direct RSVP links.
Events are automatically discoverable with structured data, OAuth 2.0 API access, and proactive webhook notifications.Learn more about our AI integration →
Free vs Pro: What Office Teams Get
The free tier handles everything a small team needs. Larger offices and regular event organisers unlock extras with Pro.
Free
Perfect for occasional events
Pro
Free forever — all features included
Pro Tips for Office Event Organisers
Pin the RSVP link in your team Slack channel so it's always easy to find
Set capacity 5-10% below the true limit for last-minute additions
Use the "items to bring" field to list what people should prepare or bring
Export the CSV the morning of the event and share with the venue or caterer
Enable guest RSVP so contractors and visitors can RSVP without creating an account
For recurring events like weekly drinks, use Pro's recurring event feature — set it up once
Add a cover image to make your event page look professional when shared on Slack
Your next office event, sorted in 60 seconds
No spreadsheet. No email chain. No chasing. Create an event, share a link, and get instant headcounts. Free forever.
Related Reading
HR & L&D Event Management
Streamline training sessions, onboarding days and compliance workshops.
Event Planning Checklist
Step-by-step checklist so nothing falls through the cracks.
RSVP Wording Examples for Every Event
Copy-paste RSVP wording for corporate, social and community events.
Event Waitlist Management Guide
How to handle oversubscribed events with automatic promotion.
