What did the 3 Flashes become after Frank Sinatra joined the group in 1935?

The 3 Flashes became the Hoboken Four after Frank Sinatra joined them in 1935. The quartet brought together Sinatra and three Italian-American performers from Hoboken, New Jersey.

The 3 Flashes—Jimmy Petrozelli, Patty Principe, and Freddie Tamburro—had been childhood friends who worked ordinary jobs while singing and dancing locally. Sinatra first attached himself to the trio in 1934, offering to drive the musicians and their instruments to bookings. He also became their featured singer and informal manager.

In 1935, the group auditioned for Major Bowes' Amateur Hour. Sinatra also auditioned separately, but Bowes combined the acts into one quartet and renamed it the Hoboken Four. The new group won its appearance on the September 8 broadcast and then toured with a Major Bowes company.

The arrangement did not last. The quartet toured roughly seven months, performing as many as 35 shows a week, but tensions grew and Sinatra left before the tour ended. The other three continued briefly as the Hoboken Trio. The episode nevertheless gave Sinatra an important early break before his solo career took off.