The only places I can think of so far that would be the most doable are:
1) Mall (Probably have to buy something to not look like a creep)
2) Supermarket (Same as mall)
3) Coffee Shop (same as mall + I'd probably have to bring a laptop/book)
4) Local community/state college campuses (bad timing with it being Summer though)
Beyond that, I'm not too sure. I think it would also be prudent to mention that I'd be going out and doing this alone, so that may/may not affect where I should be going. I'd appreciate more options/ideas for places to go. Thanks!