What can i do about my obnoxious boyfriend and his friends?

My boyfriend has these really obnoxious friends he always invites over even though he knows their jerks and i hate them. They have stereotypes for every kind of women there is and they openly say them and grope my friends when they come over. I have friends of all backgrounds and they stopped visiting cause of his friends. They think all black and brazilian girls have big s and like to shake them and want to have their s pinched,all asian girls have no shape and are prudes,all hispanic girls are easy were alll italian me my bfriend and his friends they groped my one black friend's and kept tryingto get her to shake her and pinched it and said she needs to get more. My korean friend had a crush on one of the guys, and he said no cause he knew she wouldnt put out and he dont orientals they're to boney but he was sure my puerto rican friend would put out. They werent to happy about his comment and left and wont come over anymore what can i do?