I went to a mixer the other night.
The socialization activity was:
1. Everyone write their name on a piece of paper;
2. That's it.
3. Oh wait no, give them to the organizer who put them in balloons, some 45 minutes after the activity was supposed to start;
4. Pop the balloons without announcing beforehand, forcing half the attendees outside from stress/ptsd, and the organizer having to pop balloons for them;
5. Magic? After that there was no more instruction. The people who already knew each other talked. I left after an hour.
Sorry, to qualify, this was a queer mixer at a gay bar.