Can confirm the location, where you said, an 'intimate' place where the 16 year old me was almost deafened by Ian Page & Co (great stuff)...and I may be miles out but support of Jump in Your Datsun rings a bell. No idea on the decor though :(
Saw them quite a few times too, but I saw this lot in the Concorde 2 after an Albion game before and it was pretty intense. Saw Secret Affair too in the New Regent 'back in the day', excellent stuff.
If I wasn't busy elsewhere, might well have given it a go.