when we stayed at Yelloh Les Mouettes, the disco was just held in part of the bar in the evening, and kids just wandered in and out, to wherever their parents were sitting. Very informal, and the adults could join in with the party dances. So in answer to your question, it shouldn't be an issue.
Daytime kids clubs are more restrictive though, as the parents don't stay.
Hi this might sound like a really silly question but we have booked Yelloh La Plage and the kids club is only age 5-7, i have a 7 year old dd and a 4 (he will be 4.10.) DS, do you think he will be able to go in the disco etc with his big sis? How would they check or find out?
we had le ranolien on request but it came back full, but i dont think they would of gone into seperate kids clubs anyway? they might not even bother with this!!