I was going to recommend all the Parisians go see Le Parc at the ballet, but it’s already completely sold out. I really hate this for live productions: i’m not spending that money on a show until i know it’s good, but by the time the reviews are out, there’s no seats left.
Btw if you’re under 28, you can get youth tickets for 10 euros to some shows at the Opéra de Paris, which kinda solves this problem for me, but still.