How do I get Bumble-Bees out of my basement?

My basement is unfinished and I play drums in a little nook in the corner, and bees just started showing up. At first, I just ignored them, then they started hitting me and it really freaks me out. Some of them have stingers and some don't. I've gotten like 8 out, but they just keep coming back. I always have a bad reaction whenever I get stung but I wouldn't like to spray pesticides. I tried placing home-made bee catchers (an empty bottle of diet coke with sugar water in it) but i think those are more for wasps. I have no idea where they are coming from, but there are a lot of places they could be coming from. What should I do to keep them out?