You used to work there?My gfriend did too(early 80's).I was a sunday regular bk in the 80's.Remember Eddie Kirkland?My first intro to the blues.Hooked ever since.Chris Duarte(aka The Chris Duarte Group),"Texas Sugar/Strat Magic".Great guitarist,mix of blues,rock,w a little jazz thrown in.Kind of a SRV sound at times.I've heard of Double Threat,but haven't them.Correction,saw DTrucks at Frankies Patio in Ybor.
I was a bit more into the Richard Gilewitz/John Fahey Jorma Kaukonen thing as I was a student of Classical guitar at the time.
I was also not one of the many deadheads that worked there. The Jorma show at the Friday Morning Musicale in Hyde Park was pretty good, though. God, those were the days.