Hot Tuna are spiritual as well as geographical mates of the Grateful Dead, formed from the same paisley cauldron and drawing on similar folk-blues antecedents. While many have come and gone, the core of bassist Jack Casady and guitarist Jorma Kaukonen remains, offering an almost-jazzier but somehow less-indulgent take on jam rock's groove-driven sound. The rich dulcet tone of Kaukonen's playing rivals that of Richard Thompson. Last year brought Steady as She Goes, their first new studio set in 20 years and a showcase of electric boogie, classic blues covers (two by Rev. Gary Davis) and acoustic skills in a somewhat mediocre set. They can still play, even if they sometimes sound tired doing it. $31–$36/8 p.m.