What they should have done was talk to these ladies, explain the situation and asked them to meet on a different day.
The local Leather folk have a bar that go to each week as there isn't a Leather bar to entertain them and its a Lesbian bar. They spoke with the owner and they meet on Wednesday and miss most of the regular crowd and everyone is happy with the situation.
This can work in limited situations, but in this case it begs the questions: What is it about that
bar, that trans should have problems going there on a Friday night? And what if Friday night is the one night they all have free to go out together? Why do they have to be more inconvenienced just for being the minority?
I don't know how the leather bar was setup or precisely what it offered that was or was not available elsewhere, and what the schedules of the people involved were like such that they could reach an agreement for weekdays... I do think it's nice if everyone can agree on something that suits them in civil discussion. But if people aren't all that civil in a given place, then we have to fall back on however to pursue some care for equality.
For another example: In a big enough city and a club with hundreds of fetish
or orientation-based clientele, sure you can set aside a weekend for each group to pursue its orientation and kink because there are so very many
of each of them, the club itself may be set up specifically for sex (among other often messy, highly physical if not borderline medical
activities) and making a great deal of money off hefty entry fees from everyone (so even if numbers are small, they pay a whole lot), and they all agree that they don't want to see precisely what the others are doing (when it often comes down to very graphic sex of a particular flavor among other things)...
But in the case in question, I think we're talking about somewhere people go to sit with a few drinks and chat. Maybe listen to music and play bingo. I'm not sure if this really compares.
And then what if the preferred live band or bingo, what have you is only on Friday night? Etc. What might the cost be of convincing a given group to come another night, if they could and were willing to? Owners could fuss over that
as a potential loss of profits, if they felt like it too...