A dance festival in Charente/Limousin which is probably the sort of thing that Weasel was describing, but I thoroughly enjoy, is at Confolens. The date moves around a bit but is usually in August. By paying a couple of euros you get access to the inner town where lots of performances take part in the streets for a couple of hours every afternoon. The rest of the time there are performances in the arena. It is also very manageable if your French isn't great as there is quite a large ex-pat community in those parts (but otherwise it's a nice place!).