Has to be grounds for that though. Thatd be like if they only let white people in,when people question this they point to their "we reserve the right to refuse anyone from entering the premises". But of course theyre wrong and that policy holds no sway without proper grounds for refusal i.e intoxicated
Suppose the bar has a dress code, their grounds for refusal would be 'you're too casual' when you're dressed just like the guy/gal next to them.
For some reason bouncers will prefer to say too casual than too intoxicated, as drunk people don't like being told they're drunk yet they'll accept the attire debunk. Of course they'll say you're wasted when you're really wasted.
Regardless, if they don't want you on their property for whatever reason, they will get their way..discrimination or not