There is a great difference between England and the USA. When slavery was abolished in England, the whole black population was absorbed into the population and had almost completely disappeared in about three generations.

Black folks now in England are fairly modern implants from the remnants of the colonies. So they, like any other immigrants, have not yet had time to assimilate into English culture.

Now in the USA it is different. Black people here are still, after all these years, treated as second class citizens and would most likely feel unwelcome attending a "white folks" event.

Azizi, you say "I think ... that American bars ... don't have live artists performing" I don't think that that is quite true, Our own Lonesome EJ performs in bars, and I have a good friend who has a blues band, who performs in Colorado Springs (he is black by the way but that is irrelevant)