Staying Alive (1983) on Netflix

In this sequel to Saturday Night Fever, former disco king Tony Manero has left Brooklyn and lives in Manhattan. He stays in a cheap hotel and works as a dance instructor and as a waiter at a dance club, trying to succeed as a professional dancer on Broadway. The breakaway from his Brooklyn life, family and friends seems to have matured Tony and refined his personality, represented by his diminished accent and his avoidance of alcohol and profanity. However, certain attitudes have not changed, as with his most recent girlfriend, who's also the singer of a local rock band.