The Cambridge University Scavenger Hunt is soon to be a thing (11th/12th June, the Wednesday and Thursday before Odyssey). This involves being given a list of silly things to find/make/dress up as/re-enact and then finding/making/dressing up as/re-enacting these things in teams of up to 5 people. Points and glory go to the winners.
Here is last year's list to give you an idea of the kind of things you have to "find" - http://cush.soc.srcf.net/previous-lists/scavenger-hunt-list-2013/
If people are interested then teams could start being formed on here.
People intending to hunt and scavenge: