I've been a member of a BJJ/MMA/kickboxing/boxing/CrossFit gym for ~10 years, starting with kickboxing, but now doing only CrossFit. My experience is that the B

I've been a member of a BJJ/MMA/kickboxing/boxing/CrossFit gym for ~10 years, starting with kickboxing, but now doing only CrossFit. My experience is that the BJJ people are the chillest dudes and great party people. There's just something about a sport with constant co-ed physical contact that lends itself to a very relaxed and comfortable attitude.