Never say accepted. The problem is balance. As soon as you have too many of one nationality all the others leave. The same goes for sex. You have to actively balance nationalities, and the sexes, to keep a club popular.
Several clubs use a dress code to maintain the ethnic and gender balance.
The implications of Sheikh Mohammed's directive, however, are that they can no longer turn away well dressed young men, no matter where they come from. The upside for clubs is that the wallet inside an Armani jacket is likely to be full of money. It has to be unique, and continue to be so. You have to have a strategy for a year at least. There are three or four real hours trading a night - four nights a week maximum.