How to Help Guests Reconnect After an Event
How hosts can help guests find each other after an event: WhatsApp, Instagram, forms, cards or an app compared, plus what GDPR consent actually requires.
It is late, coats are coming off the hooks. Two guests who talked for an hour say "great to meet you" at the door and walk off in different directions, without a number. This guide covers why that happens, which ways hosts use to help, and what to keep in mind so that the follow-up stays friendly and legal.
Why the moment gets lost
Nobody has the number. At a dinner or a run you learn a first name, maybe a job, rarely a surname or a handle. The next morning there is no way to find each other.
Asking feels like a risk. Asking for a number at the door is a small public declaration. In a series of studies published in Psychological Science in 2018, Erica Boothby and colleagues found that after a conversation people underestimated how much their partner had liked them, the liking gap. That misjudgement may make it harder to ask to meet again.
The week takes over. A timely follow-up can help. The host guide linked here recommends sending match results within 24 to 48 hours.
The options compared
| Way | Effort for you | For guests | Privacy | Limits |
|---|---|---|---|---|
| WhatsApp group | Low | Free and familiar | In a normal group every member sees every number | Also reaches people nobody talked to |
| Instagram story with tags | Low | Only for guests on Instagram who agree to be tagged | Public: your followers see who was there | Not for sensitive evenings |
| Form or email by hand | High, every evening | Fill in a form within a set time | Good if contacts are only passed on after a mutual yes | Matching is manual unless you set up automation |
| Cards on the evening | Low | Need the courage to hand one over | The guest decides who gets a card | Same hurdle as asking for a number |
| App like before | Low once set up | QR code and selfie at the door, no profile | Contact only on a mutual wish | Only for guests who checked in; no morning mail without an email address |
WhatsApp group. WhatsApp Communities can hide numbers in announcement groups, but most event groups are plain groups. The Landessportbund NRW advises sports clubs on its VIBSS portal not to set up WhatsApp groups themselves, mainly because of how WhatsApp reads address books.
Form or email. This is the classic speed-dating method. The Museums-Date of the Prussian Palaces and Gardens Foundation at Schlossmuseum Oranienburg does it by hand: guests can get in touch within three days, the museum asks the other person, and only passes on contact details if they also want to meet. SpeedDating.de and 7minutes2love do it online: participants mark each conversation partner yes or no within 48 hours of the event's start, and a mutual yes counts as a match. With a spreadsheet you can automate the matching with formulas; without that, someone compares answers by hand and stores the wishes with a third-party provider, which belongs in your privacy notice.
Cards and name tags. Name tags make the evening easier but do not help afterwards. Cards for a handle are charming, but ask for the same courage as a number.
Apps. Some larger formats built their own; Timeleft, for example, lets diners stay in touch through Connect. For a single host, building an app is out of reach.
Privacy and consent in Germany
- Mutual consent is the fair standard. Contact details only flow when both people have said yes, as in the museum example above.
- Handle sensitive evenings with care. A queer singles night, a health-related self-help group or a religious community evening can reveal sensitive information. Do not publish guest lists as a default.
- Ask before publishing photos. You generally need consent to publish recognisable photos of guests (§ 22 KUG); § 23 KUG has exceptions, and data protection law can apply as well. We recommend asking before you tag, too.
- Delete what you no longer need. Decide how long you keep lists and wishes, and stick to it.
Checklist for your next evening
- Tell guests at the start how they can find each other afterwards
- Choose one follow-up channel
- Get consent before sharing contact details, and share only on mutual interest
- Keep one-sided wishes to yourself
- Ask before photos go online, and do not tag without a yes
- Treat singles, queer or health-related evenings as sensitive
- Send the follow-up the next morning, not next week
- Delete lists and wishes once the follow-up is over
How before handles it
before is a web app for this step. Guests check in at the door with a QR code and a selfie. The next morning, guests who checked in and left an email address get an email in your name with access to the afterparty. For seven days they can see the selfies of the other guests who checked in, unless someone has left or blocked them. Next to each person there is one button: see each other again, if both want to. One-sided wishes stay invisible in the app; only when both press it are both told, and a chat opens. The app sends no rejection notices. Whether people actually meet again is up to them.
As the host, you see check-ins, your guest list and totals. Selfies, wishes and conversations are not shown to you. The seven days are how long the afterparty is visible, not an automatic deletion period; the details are in the privacy policy.