Eldest DC has just started a gymnastics class, space for 10 but only 5 in there at the moment.
4 children in the class (including my DC) love it and get on with the activities. One mother brings her child and it NEVER joins in, it runs around jumping on the items, equipment or just messes about trying to entice the other children to play. My DC is easily led and a few times I've seen him just about to get up and join in with this child. But a quick "No - listen to the teacher please." stops him and he gets involved again. The teacher has pulled off equipment a few times and said "You either join in or you have to stay over there, it's not safe." Child just screams and wriggles out his grip.
The mother keeps saying "You join in or we put your shoes on and go home." Child shouts back "No!" Repeat 20 times in the space of 30 mins The child continues lounging around on the mats, climbing the beam or running around trying to entice the children away. After 4 weeks this is getting on my tits and last week another mother confessed to me she's getting annoyed and looking at other classes.