Flying By (2009)

A real estate developer goes to his 25th high school reunion without his wife, and finds his old teenage band playing. They get him up on stage for a couple of songs, and convince him come to a rehearsal. His wife is outraged that he played. His daughter thinks it's kind of cool. His Mother, in a retirement home, encourages him to enjoy life. He feels some temporary relief from the pressures of business complexities and the stress of marriage tensions. The band gets booked at a popular bar, which leads to a last minute booking to open for a reunion tour, with the possibility of additional tour dates. But the band has internal conflicts. He faces a tough decision to give it a shot even though it will affect his marriage, his family, particularly his daughter, and his business.

Source: TMDb