During the week, Manu Massabova and some opera's riders ride at Dupleix: there's a big surface like opera but many children play at the end of the afternoon.
Jimmy Petitet and other riders ride at the town hall of the 15th district: it's a very little place. Now you can understand his spinning style!
There are other places in Paris (Bastille, Palais de Tokyo, Trocadéro, Bercy...) but the must is Opéra