I went once with DS when he was about 6 and really into it. I found it all quite uderwhelming tbh - it was the year with Kelvin Fletcher and Karim (early 2020 just before everything shut up shop). Everything was rehearsed to within an inch of its life and the judges' responses were entirely scripted and predicable.There were probably some good professional routines but the "celebrity" dances we'd all seeen befoer so almost no element of surprise, except for Bruno Tonioli singing "can't take my eyes off you" (badly). I wouldn't go again. It was full of middle aged wives and accompanying husbands, and quite a lot of families. Overwhelmingly female crowd.
however DS was thrilled when we were in Pret nearby beforehand and Neil and Graziano and a couple of others came in, basically just to pose for selfies. They were quite literally looking for attention but quite nice and friendly with it.