Zoka in the U District is nice and big, has free wifi and it's pretty easy to park around there, there's free parking on the neighborhood streets. Plus it's where Wil Shipley goes (went?) to write Delicious Library :)

http://www.zokacoffee.com/index.php/page/Display/locations

Bauhaus on Cap Hill is pretty great, although a resto-bar would also solve the problems of having minors not being able to attend while letting some of us sip a cool beer.