To sleep over, to meet some cool people, or just to stop by - if you are in Jerusalem I highly recommend stopping by the Heritage House. Requirements: a sense of humor, an ability not to take yourself too seriously, and the ability to not get easily offended. The guys are absolutely great. They have amazing activities. They talk about real controversial politics. If you can't deal with strong opinions you might have a hard time. Everyone is truly nice though and they will take care of you. Someone might/probably will make fun of you at some point but it's part of the Israeli experience.