I was a member of a ukulele ensemble a few years ago. I joined when I first started playing uke four years ago after playing guitar for almost 50 years, so I came in as an intermediate player, but i considered the others advanced. Over the one year I was with them, at times I had to struggle to keep up, but most of the time I was keeping up, until one day when we were rehearsing for a gig and the one guy who very much considered himself the "pro" of the group called me out for not keeping up.
We had just learned the song and played it a few times at slow tempo, then suddenly he decided to go up tempo, so I stumbled. What really aggravated me was everyone one of the other seven members flubbed one way or another through rehearsal and he never said a word to them. I was already feeling insecure about my level of expertise, which was making it not so much fun, but that was all I needed to fianally decide to drop out. I'm actually a member of another group and I have to say, I'm much happier with them than the ensemble, especialy that jerk.
But personally, I keep a pair of these near always. As I said earlier, even if you don't end up using them onstage, they are very good at reducing the snores of bandmates if you end up sharing a room with them 
