Some ideas:

PLEASE ADD YOUR OWN!!

• the bastard squad dawn chorus
• the faK-hut
• LoFi Karaoke
• HouseBand
• OpenMic or Jamm
• PoppersWrestling
• Air guitarists anonymous
• Pirate Radio (aaaaarrrrrrgh)
• Glam vs rockabilly band comp
• Defending yourselves from deadly Ninja attack!
• The people's republic of disco (bring your own vinyal for a truely democratic mash up)