Plasma Rally is a tight symmetrical board full of funz. Team flag rally/slayer are just two of the most fun, and tested, gametypes use with this map. (Bomb and Ball in testing)
Tight area, many obstacles, much fun. 4-10 players.
NOTE: Vehicles are just for atmosphere...krap on the walls. ;)

Don't forget to grab the gametype for all the correct settings.
Plasma FlagRally - http://www.bungie.net/forums/posts.aspx?h3fileid=24994006
Plasma TeamSlayer - http://www.bungie.net/forums/posts.aspx?h3fileid=25027149