Women usually have to deal with a lot, and a big part of the reason what that is the case has to do with the fact that there will always be men that would want to try and take advantage of them in some way, shape or form. Even if you are on a party bus and are just trying to vibe so that you can maximize your overall enjoyment of the life that you are currently living at any given point in time, you might find that a guy would try to flirt with you to the point where he might just make you feel extremely uncomfortable or at the very least annoyed that he is not leaving you in peace to do your own thing.
The best thing to do if some dude is bothering you on a Chicago party bus is to look into just walking away entirely. This is perhaps the biggest rejection that you can give to anyone, and most men are going to be far too prideful to ever think about keeping things up in terms of flirtation and they would possibly be far too embarrassed to ever try anything like this again as well.
That said, in some circumstances the guy in question might just get pushy if he gets rejected since a lot of guys don’t really take this type of thing all that well. If this is what starts to occur then you need to alert the organizer of the party immediately so that they can look into fixing things for you and pushing the guy out of the party bus since he is really ruining the vibe that people want.