Telestrations
A reliable icebreaker because nobody needs to be good at drawing; it actually helps if they aren't. Everyone sketches a secret word and passes their book. The next player guesses what the sketch shows, the next draws that guess, and so on until every book comes home.
The reveal, when a simple word has turned into something unrecognizable, is where the room falls apart. The original box seats 4 to 8 and is rated 12+, with a game running about 30 minutes. The rules fit in one sentence, so it works even with strangers.
More about Telestrations