According to his own estimate, Allen was a prolific composer who wrote more than 8,500 songs, although only a small fraction of them were ever recorded. In one famous stunt, he made a bet with singer-songwriter Frankie Laine that he could write 50 songs a day for a week. Composing on public display in the window of Wallach's Music City, a Hollywood music store, Allen met the quota and won $1,000 from Laine. One of the songs, "Let's Go to Church (Next Sunday Morning)" became a chart hit for the duo of Jimmy Wakely and Margaret Whiting, hitting #13 pop and #2 country in 1950.