Speed Scrabble. Best game ever. Like Scrabble but for people with ADHD (not to name any names). Playable with as few as one and as many as infinity. Perfect.
No board. Each player takes 7 scrabble tiles and makes their own individual crossword puzzle. As soon as anyone has used all thier tiles they say "Go." Everyone else takes a drink and everyone takes a new tile and adds it to thier own puzzle (which may be deconstructed and rearranged at whim). Bonus points for spelling words agreed by all present to be "cool."

Best results would surely be found in a crowed bar, late at night. Zeitgeist was chosen for its abundance of tables and wankers. But upon our tardy arrival, the slatted tables were discovered to be too inhospitable for crosswords, especially for thier inhabitants who were generally in a state of advanced inebriation.

After one unfortunate incident in which crosswords were made containing no actual crossings or words, tiles were lost, and beer was spilled all over Bex Drive's lap, the rules were quickly changed by the cunning Kyle Crocodile to meet the needs of drunk stoned users of slatted tables:

Each player takes 15 tiles and makes a sentance. Those who make the coolest and most sensible sentances, or do so quickly, or using big words, may give themselves a hardy cheer and brag to those around who are not too stoned to listen.

The SF0 veterans begin playing again. When one man's curiosity is peeked. He likes scrabble, he says, but is too drunk right now. Perfect. He joins us and quickly his entire group joins us.
After a several rounds, Bex and Borchid get up and go to the bathroom. Kyle follows suit and the table continues playing without missing a beat (or noticing).
After an extended absence (long bathroom line), we then seemlessly reenter the game and continue making awesome sentances.

The odds were great against us. My lap was sopping. The scrabble tiles are now sticky and smell like beer. But we triumphed and a great time was had by all!