Protospiel is a big game design parties. Most of the attendees are authors, carrying work that varies in completion from “heading to the printer” to “thought of it this morning.” Playtesters--people who attend to play and nothing else--will be milling about. Publishers will be scouting for the jewels among the mass. No matter what your role, everyone will be playing a variety of games, offering feedback, impressions, and suggestions.
More details here: http://www.protospiel-houston.org/