In 2013 the Cracow (Kraków) startup community organised a 1000 person plus Christmas party almost for free. this presentation describes how it happened, The event is here www.facebook.com/events/243684662456724/ links in the presentation don;t work :-( some of them are here the 2012 event https://www.facebook.com/events/317009831746974/ http://www.hive53.com/blog/hive-xmas-party-in-kitsch #omgkrk Facebook post 23rd Nov 2013 https://www.facebook.com/events/243684662456724/ https://www.facebook.com/richardhlucas/posts/10151758700206828 https://www.facebook.com/groups/omgkrk/search/?query=MSFBCC#_=_ http://richardlucas.com/2014/02/community-building-at-events-greatness-is-found-in-the-detail/