At the Alfy's on 196th in Lynnwood, from ~17:30-21:00, there's a regular group that meets to play Magic: the Gathering. There are players of all skill levels and lot of variant format play. Lately we've started some EDH.
You'll always find some kind of casual multiplayer game but if you'd prefer having someone to playtest your deck for an upcoming PTQ, you can probably find someone. There are also at least 2 regulars who are judges so you can get any random rules question answered.