Camping Uk

I’m 16, and trying to find a summer job in france for over the holidays (about a month). maybe to improve my french but mainly to spend my time useful and fun. I’d love to work behind the bar or as a waitress - at a beach or summin. (well, who doesn’t?) Anyway, the only jobs I can find now is to clean laundry in hotels etc… and I’m not too excited. Is it possible to work in a bar at my age - day or night?? (eventhough I’d rather spend my nights to go out). or could you work at a camp site or something like that? anything! =P