Playing on that boombox — maybe 500 acts a year for 37 years — have been Stevie Ray Vaughan, before he became a superstar, to about 50 people, although hundreds more now claim to have been there. Rodney Crowell, early on the tour for what would be his mega-selling "Diamonds and Dirt." Johnny Paycheck playing in between breaths on an inhaler. The recent benefit shows that have seen John Hiatt and Jason Isbell play that roughly 350-person room with the white Christmas lights lining the perimeter. And all the great shows with the regulars: Brave Combo and Chenier and Escovedo and Alvin, most every blues great, and still, on Sundays, the big-band jazz that had first made the club's name way back in the middle of last century, when it was the Hunt Club.