Well, I had a similar problem with my partner.
I hated his friends because one of them called me a 'b!tch' when I confronted him for bad-mouthing me to my partner.
His other friends were absolute duds, underachievers, low-class mentality, mannerless - somehow pretending you have ill-breeding is something cool in their culture because it shows they can't care less and adds to some twisted view of masculinity.
My partner has been brought up with a very worldly view as he didn't really get time to allow the cultural habits of any particular culture eat into him, so he's quite different from his friends in that respect.
I first told him I couldn't understand why he would want to mix around with such idiots considering he is a much more level-headed person but figured that these were his childhood friends so you really cut childhood friends alot of slack when it comes to their misgivings.
I started to push them away and demand that he stop seeing and contacting them. He did so, stopped talking about them but started doing so behind my back!
So I sat him down and told him that this really isn't working out. What's the point of agreeing to my demands if he's not going to follow through?
I tried to work out a compromise.

I tried to meet his friends and actually sincerely get to know them and see their positive sides along with their negatives as something everyone possesses.
As they started to know me they really ended up liking me (much to the slight jealousy of my partner, lol) and my partner now gets scolded for not thinking of a birthday present for me 2 weeks before my birthday or for not 'listening' to me enough.
The one who called me a 'b!tch' got an earful from my partner who saw the effort I was putting in to accept his friends and incorporate them into our life in a fair and reasonable manner rather than dictate when and how he could or could not see them and felt that he had to take responsibility as well for my happiness and satisfaction.
He made it clear that if he ever disrespected me again he would cut ties with him completely and that is his best friend.
I can understand and see now why he was so hesitant to just cut them off, in his head I was just being demanding and unreasonable because I "just didn't like" them, when really the very thought of them offended me.

I think you have to get your boyfriend to get to know your friends better and make an effort to compromise with him.
Maybe spend more quality time with him but point out if he doesn't notice or expects it to be a given that you do compromise as well when it comes to doing things you do not really enjoy for him.
You could also try to talk to your friends to tone it down when he's around, or introduce the less 'wild' friends to your boyfriend so that he can see that not all of them are bad influences.
You could also get him to fetch you so he can pop in and see there's nothing wild going on and give him a call whenever you're at the club for a quick chat to let him know you're thinking of him.
Its basically the lack of knowledge and understanding of the people and situation which ends up with your boyfriend 'filling in the blanks' with what he doesn't know.