Love BB KING!  I seen him twice in concert at the same casino.  After the concert , we went up to the room for a drink and was heading back down stairs to gamble a few hours.  When the elevator door opened there was BB KING and 3 of the LARGEST  body guards standing around him. 1st guy steps out...  did not say anything and had his hand in down position and waved it back and forth (a silent  step back)  so we did.    Never engaged him, never asked for autograph. He was done for the night and heading to his room.   After he wheels down the hall about 20’ he says   “ goodnight kids”   In return  Goodnight BB!!!!    It was a amazing concert.