As many of our readers already know, Keller Williams grew up listening to the Dead, catching each of the groups Deer Creek performances from 1989 to 1995 (as documented in part via his live staple, Gatecrashers Suck). In 2001, Williams scored a spot on RatDogs So Many Roads Tour, performing with Bob Weir three times throughout the summer. To have Bobby in my in-ear monitor and playing next to me, Williams told Relix in 2004, I was definitely one big grin. On Monday, Williams was no doubt grinning again after he joined RatDog onstage at Washington, DCs Warner Theatre for the Band’s The Weight. Williams will perform at Pittsburghs Mr. Smalls tonight, while RatDog will be at Syracuse, NYs Landmark Theatre tomorrow.