check out r5productions.com

the music you’re looking for can often be found at the First Unitarian Church, and if it is, R5 will know it. usually stuff in the postrock/noise/experimental end of the spectrum goes through them.

also, Heyday Entertainment (.com) might be helpful… but probably not as much as R5.

Definitely check out r5. Also take a look at the events section of The Rotunda’s page. They’ve got some experimental shows sometimes:
http://www.foundationarts.org/foundation.html

r5 does shows all over philly at different venues, mostly r5, but they’ve been branching out the past year with places that have liquer =P. i like the myspace page better, it’s just easier for me.
http://www.myspace.com/r5productions

here are some of the places that they occasionally book at, which also book their own shows.

http://www.heydayentertainment.com/
they put on shows at the kyber and northstar bar.

http://www.myspace.com/northstarbar
seems like it’s normally more local stuff.

http://www.myspace.com/khyber
metal hardcore. atleast thats the way i imagine it.

http://www.myspace.com/worldcafelive
the nationally syndicated college radio station, has it’s own venue. i don’t like teh diner type setting, but they do have some good acts that come through occassionally, if not known, very talented.

http://www.myspace.com/johnnybrendas
meh.
http://www.myspace.com/TheManhattanRoom
more local stuff

http://www.myspace.com/phillysilkcity
mostly a club/lounge, but in late January there is a Smiths cover band playing there. =)

heyday entertainment might help