IIRC he was white. Then Eva changed his race to black. Not sure why she did it, she made no comment about it.
The best reason I can think of is that Eva wanted to include a nod to GGGB, since the bouncer there used the same model and was black. So perhaps she changed the skin tone to resemble the dude from GGGB, like a cameo of sorts?
The other reason is that maybe Eva wanted to include the bouncer in future sex scenes. Since the bouncer is clearly interested in Holly, Eva thought that making him black would be more fitting (bbc kink and all that)?
Of course it could be for the sake of representation. But then why him of all ppl
?