My Mum went to a gig, she believes around Feb/March 1964, when the beatles returned from America, with PJ Proby and possibly Cilla Black. It was at the BBC studios in London. She got the tickets because her friend had a birthday on a particular date in February (that's how they were alloted?). I'm sure it was quite a seminal moment in TV for some reason.
There were platforms at the side of the stage where people stood and looked down on them playing and I can remember seeing that on TV.
Is this helping?