Is it normal that my boyfriend is hanging with some prostitute friends...?

Need more details OP???

Are they male or female?
Is he just hangin with them or are they blowin his horn?

If you're too innocent for this and want to stay that way, leave him! It's better to be alone than with the wrong person especially if they've got weird friends or family. Put on your track shoes and RUN!!!

I have all kinds of dysfunctional friends. It's normal if you hang out with the weirdo crowd.

Context is needed. This is pretty burnt no matter how you look at it, but is there some other reason he needs to stay in touch with this person? Are they childhood friends? Does this person need help? It does not necessarily mean he's cheating on you with a prostitute (Why tell you? Secrecy/simplicity are the main points of hiring a prostitute) Still, you have to question his judgment...

He may or may not be sleeping with them. First question you have to ask is are they elite or just dirty street whores. If elite then read on. If dirty street whores... He's probably either paying them to have sex or he's a drug addict anyway and hookers is your last worry. If they are elite how many is he hanging out with? If its more than 5 he could be a pimp and not every pimp sleeps with his whores. You gotta look at other stuff. I have a family member who is an escort and its a really strange business. Unfortunately he

ummm he is "playing you" and having sex with them no doubt

try just a little bit harder

No male has prostitute "friends" .
You are too innocent for this douche, go find a nice respectable guy.

This needs a bit more information like Gender of everyone.

Are you worried about him cheating on you or are you just freaked out by the whole prostitute thing?