How do you say "do you play piano"? is it "Bạn có chơi piano không?"

Question

Answer

Bạn có chơi piano không? is a perfect translation.

there are another cases when the question may be a bit different. 
For ex, when you want to ask whether or not a person has an ability to play piano, you might say: "bạn có chơi được piano không?" or "bạn chơi được piano không?"  hay "bạn biết chơi piano không?"(are u able to play piano)

Answer

The answer by yourself is correct. "Bạn có chơi piano không?"