Not everyone gets to be Elvis, Bruce, Mick or Ringo . . . but, you know what, a cult following is nothing to sneeze at. Except in the cases of singer-songwriters like the ones in this show whose cult is so small they could all be sneezed on at once. Here’s Dusty Gems, the show highlighting artists who aren’t household names and probably will never be. C’mon, check out all people your weirdo brother in law has on vinyl. You’ll like it. And only eat one of the brownies he offers. Seriously.