Play sardines

My friend who is an absolute birthday queen has a birthday weekend every year at a hotel and the best part is a game of sardines (where one person hides and people join them as they find them - last one looking looses). The absurdity and space of a hotel helps but I think you could make it work many more accessible places. There is nothing funnier than being in a giant group of adults trying to hide and not laugh hysterically especialy in a public place. And you end up talking to more new people just because you have to which is an added bonus.