Hotel Pennsylvania during the three years of Miller's great popularity as a major bandleader of the Swing Era. Glenn Miller and his Glenn Miller Orchestra broadcast multiple live radio performances from the Café; some were recorded by RCA Victor. Gray, Shaw's principal orchestrator from 1937–39, was immediately hired by Miller as a staff arranger when Shaw deserted his band; it was during Miller's 1940 engagement at the hotel that Gray wrote the popular instrumental tune that immortalized the Hotel's telephone number. The hotel's telephone number appears in the title of one of his best-known songs, "Pennsylvania 6-5000". Les Brown's band, with its
Sometime (Glenn Miller song) introduced the song as follows: "Now comes a number that was originated right here in the band. Glenn and Mac the piano player got together and wrote it. Ray Eberle sings it. The title: 'Sometime'." This song is different from the Gus Kahn and Ted Fiorito song of the same name from 1925 and the 1918 Rudolf Friml and Rida Johnson Young song from their musical of the same name. The song was first released commercially by RCA Victor in 1963 on the album "Glenn Miller: On the Air, Volume 3", LSP 2769(e), and as a three record box set,