He started his own ballroom dance band in 1926. His orchestra started playing the venetian room of the Southmoor Hotel in Chicago. That was significant. Ballrooms were a good gig, but hotels were a regular paycheck. In 1928 his band began playing at the Metropole Hotel. (This venue was also the headquarters for Al Capone.) In 1929 he broke into radio. His own Castles in the Air program debuted live at Al Tearney's Grand Auto Inn. It was at Grand Boulevard and 35th street on the South Side of Chicago.This was a live broadcast for WBBM.
That attention got them a gig at a bigger venue before the end of 1929. They were playing at the Terrace Casino room of the Morrison Hotel, still on WBBM. In 1930 they moved to the even bigger place, the Walnut Room at The Bismark Hotel. But I feel the need to remind you that the music was lame. In his book That Toddlin' Town: Chicago's White Dance Bands and Orchestras, Charles Sengstok described the situation thus:
"Since most dance bands sounded alike in those days the challenge for an orchestra broadcasting frequently from one dance venue or another was to develop a special sound that would quickly identify it to listeners. bands introduced theme songs and tag lines The Musical Gems Of Ray Pearl" or "Art Kassel And His Kassels In The Air." But more than that, they hired arrangers to give their music a distinctive sound, which often resulted in music with more style than substance."
In 1951 Art moved to Encino California where he appeared for two years with a new orchestra on a local television program, The Gloria Hart Show. He never went back to radio. He died in 1965 of cancer.