Hi- a couple of years late on this topic but what the heck, here's some more info.
The Night Out opened in April 1974 at which time the resident 9 piece band was Eddie Grey and The Shades Of Grey featuring lead singer Patti Sommers. The support band was Delta Dawn lead by Jeff and Julie Botwood as previously mentioned by Jeff Jr. The General Manager was Clive Preston and head of security was Eddie Lister. David Goddard was Stage Director, Rick Solly on sound and Tony Jover on lights. Compere was Scott Paul Young.
Over the years the support band changed to Moonlight led by Jan and Bob Johnson, and then Misty Morning (I can only remember Misty's drummer's Name - Adge). Eddie Gray and Patti Sommers left and were replaced by Roger Rae and Sue Adams. Scott Paul Young was replaced by Ricky Disoni and then Frank Patterson, and Clive Preston was replaced by Paul Lillicrap (note the spelling - and he changed his name to that by deed poll, or so he told me).
Oh yes, and the [censored] Bag was a must, 6 days a week
So there ya go! Great times.
Tony & Patti