Correct. I was an adult leader on a high school youth mission trip a few years ago and we shared our site with a UCC church from Boston. My impression: A gay party club with no knowledge of the Bible.
This being Connecticut ... my wife grew up in the UCC and is a regular parishioner. I am an irregular, pretty much Christmas & Easter guy. We had a great pastor who moved. The temporary pastor was a gay man, and so is the new full-time pastor. Our Democrat congresswoman is a member. That said, there are some conservatives in the mix that I sit with at the occasional pot lucks. We recognize our spot behind enemy lines and do have some laughs. One of the founding pastors honored on the plaque at the back wall of the sanctuary is an ancestral cousin. Him spinning in the grave is probably what keeps the lights on.
About 30 years ago, the high school youth group from my church had a joint retreat with a UCC church. I got a similar impression.