It really depends on the UU congregation. The UU church I went to for years was lovely and working class. Then I moved and the new UU church was more moneyed/cringe/judgy/into performative virtue signaling. I really wanted to like them but left after a few months of feeling I was unwelcome.
unfortunately both not a thing in my country and also a church that gives me bad vibes due to a lot of them thinking all worship of any god is worship of the Christian God