Johnny Mathis, with Sy Zenter and His Nationally Famous Orchestra, played the Minneapolis Auditorium on November 15, 1963.  Zola Thompson has this memory:

My parents lived on E. 16th Street and must have been taking care of our two little ones (born in 1960 and 1963).  My husband and I passed the parking lot on the east side of the auditorium late and were flagged down by a black man, all alone in the lot with the hood up on a new black Cadillac.  He said his car wouldn’t start.  We told him about a gas station/garage on about 14th Street and 4th Avenue.  We could see it from the lot.  The owners lived next to it or above the garage.  Wish I could remember their names but were well known in the neighborhood.  Then the man told us his name was Johnny Mathis and he’d just finished a show at the auditorium.