Originally Posted by alesis

Any hotel lobby
Any Starbucks
Any cosi

Bean Exchange on 6th and bainbridge(any coffee place sells more than coffee-water, smoothies, fruit drinks, milk, etc.)

Honestly, I think your best spot would be either cosi or starbucks on 4th and south. I've been in 2-3hr meetings at cosi and never once had a problem. The starbucks on 4th and south has a very nice 2nd floor where no one bothers you.
Philly Java Co. also has a back room that is secluded.

One other note: I have a higher end brand new laptop and 4hrs. is about the max I can get with wifi on half the time. Make sure you have extra batteries or pick a place where you can plug yourself in.