That's the problem with RnB/Hip-Hop clubs, and it's been like that since the early 90's (I'm showing my age here). Everyone at an RnB club seems to think they are better than the next person, and the general "friendly" nature is non-existent unless you go with a group of friends and/or go to the same place(s) regularly and establish a group of friends.
Also, regardless of how many DJs play and how good they are, they all seem to play the same songs over and over, and usually to please the masses it's something that's already too commercialised and mainstream for me to want to hear it again in a club atmosphere. There is soooo much quality so called "underground" hip-hop and RnB out there, and I'm sure that the DJs are aware of it, so why not play it?