This scene is from Dare Dorm and its has a group of college students playing Kings Cup.  If you have never played the card game before just check out the rules I have a link in the gallery for you newbs.  It starts off as a fun game or whatever, but then one girl takes it a little to far and at the point the party could have gone two ways.  Everyone could have went YUCK and left, or like what happened here the other girls joined in finding the nearest cock and sucking and fucking until they milk a cumshot from the guy.