Honestly, think about it from the bar's perspective. These people were paying to be there and helping keep the bar operating. That's literal financial support to the lesbian community.

Lesbian bars have gone under because it's no longer economically feasible to have an establishment cater to such a small community. The overhead for owning a brick and mortar business, and one that sells mainly alcohol at that, is so high they need to be packed several nights a week to make a profit.

The ones who have survived have done so by selectively allowing outsiders in if they behave. A lot of times that hasn't worked out and transbians and pervy straight men have driven lesbians away (like a bar I know that has now rebranded as a karaoke bar in recent years.) It sounds like this bar's owners have found a good middle ground. At least they're still here.