Any ideas for what we could use as a table theme?!

I am a leader on this music camp coming up and each leader gets a group of 6 people (not including themselves) who, on the last night have to come up with a theme for their table as a sort of tradition.

Ones that have been done in the past have been wearing clothes backwards, towels on your heads, everyone drawing moustaches on their faces, sleeping bags etc.

any ideas because i cannot think of anything!