Yes. I had a short foray into Unitarian Universalist land about 15 years ago.
In short, they are very liberal Christians to the point that they're not exclusively Christian or even religious.
It's mostly a feel good meeting place for agnostics who still like the the comfort and ritual of meeting together at "church."
The one I visited a few times had Christian groups, Jewish groups, and pagan groups meeting separately. There was a feel good generically inspirational service on Sunday mornings as well as children's Sunday School.
I only met one person I knew there. After the meeting I saw my sister! We had both left the witnesses a few years earlier. I think it was an obvious step down from JWism to non attendance.
I now don't feel the need to go to any services and am rather atheistic. I think there was an element of buying in to societal expectations that "good people go to church."
I'm beyond that now and enjoy my relaxing Sunday mornings at home snoozing in and making homemade pancakes.