A gut feeling and I have no hard statistics to bear it out, but the impression I get is;

Americans posting here are more likely to be professional or semi-professional performers.

A larger proportion of the Brits are amateur musicians. Many of the threads on venues in the UK are for sessions or folk clubs where people get together simply to play the music and sing the songs they love with friends and other like minded people.

This is not to say there aren't announcements for professionals performing from the UK, but we seem to see less of the announcements from the amateurs in the US for their events. I'm sure they are there.

Please! let's hear from you.

I'm in the UK, BTW and one thing I noticed when I visited the USA for the first time were the distances. You had to set aside whole days to go between places. You can see the difference in the way the we talk about distance. Ask "How far is it?"

USA response "About four hours drive"
UK response "About 200 miles"