Some place that will take a stripped screw out for me?

Some place that will take a stripped screw out for me?

I have a very badly stripped screw that I've been trying to take out for the past two hours. I've tried all the methods I can, rubber band, flat head, a bigger size bit, etc. but not things like a dremel, hammer, etc. (live in a dorm, not allowed to have that kind of stuff). If I take it to the hardware store, would they be able to take it out for me just this one time, or would they just try to sell a product that they think can do it?