Forgot to mention I can’t remember a support act if there was one. There usually was and it was a good way of seeing an act you might not usually catch but can’t remember anybody else being on this particular concert.
As an aside I note your comments above on Lionel Richie’s singing. I remember Jerry Williams saying that he “unfortunately” was the one that persuaded him to sing. He produced their first record for Atlantic in his brief spell as a producer on Atlantic in the late 60’s along with stuff on Patti Labelle and the Bluebelles and the Drifters, They were a strictly instrumental before that, He wasn’t a fan of his voice but realised his potential as a singer.