Unusual/wacky/fun/cheap place for a wedding reception?

next may we will be getting married and were stuck for ideas.we haven't got a great deal of spare cash and only intend to invite approx twenty people. we'd like to incorporate a meal that is provided by the venue as we dont want to be cooking on the day. our house is too small to have a party so we need somewhere different. We are a bit chilled and hippyish so we'd like somewhere a bit different if poss. Please help..