Name of a love movie, about a guy (composer), whose girlfriend left from a club when he performed on a piano?

He is with a girl, who doesn't appreciate his hobby. He has his
"hidden" cabinet, where he keeps his stuff. Once he performed in a
club on a piano, but the girl left in the middle of performance, since
she was bored. Later he started to see another girl, who, on opposite,
stayed in the club, when he performed.

Does anybody remember a name of this movie? :)