San Antonio Rose (1941)
San Antonio Rose is a 1941 American black-and-white musical film starring Jane Frazee and featuring Lon Chaney, Jr. and Shemp Howard as a faux Abbott and Costello; it was also designed as a showcase for the then-popular vocal group The Merry Macs. The plot involves two rival groups of entertainers converging on an abandoned roadhouse with the intent to reopen it, unaware that a gangster is eyeing the property for his own scheme.
More at Wikipedia.