There aren't really any that i know of. Not for that kind of thing, anyway. I would love to open one actually, but I have any way to get starting capital because I'm poor...

People just use local restaurants with good wifi.

Panera bread is ok, but the WiFi is time limited starting with the lunch rush.

The Bean Counter has 2 locations now, and they are great. The one on highland St can get a little crowded with WPI students though. Haven't actually been to the new one on Grove St, but it's a little further walk from the main campus.

Birch Tree Bread Company is great too.

Nu Kitchen is good, but they tend to have their volume cranked too high.

Denny's got me through college because they're cheap and open almost 24/7, but you have to ask if their wifi is working that day, and you'll need a booth for power. If you need privacy or quiet for voice calls, you might be able to ask to use the back room, but you'll likely be forgotten about with regards to service during the busy times because they don't usually use it except for events.

McDonald's has acceptable wifi most places now, as does burger king and Dunkin'Donuts.

I've been known to park outside of Lowe's in a pinch.