There's a fair number of us in York, spread across a wide number of factions.
Car sharing, unfortunately I cant help with - my entire group are none drivers.
For board games and the like you might do well to look in Travelling Man and if you're into wargaming or RPGs then here is a good start -
http://www.yorkwargames.org/
IC Kage-Kitsune Miso
OOC Wayne Caygill, just a player, nothing else