When any jam-friendly band rolls through San Francisco, the shadow of the Grateful Dead somehow looms over them. That shadow is sometimes literal, as many of the city's venues have direct ties to the Dead and still feature framed concert posters or photographs from the band's heyday on their walls. The Black Crowes acknowledged and honored this history on Sunday night when they closed out their five-night stand at the original Fillmore -- the auditorium where the Dead performed many of their early, now-legendary gigs -- by welcoming Dead bassist Phil Lesh to the stage. Spoiler alert: they jammed.

Lesh escorted the Crowes through their five-song encore of material taken straight from the Dead songbook: 'Loose Lucy,' 'To Lay Me Down,' 'Sugaree,' 'Deal' and 'Turn on Your Love Light.' It may have been the final encore of the run for the Black Crowes, but it was not their first time crossing over into Deadhead territory. The band opened for the Grateful Dead in 1995 and two years later headlined the Deadhead-minded Furthur Festival, which toured American amphitheaters that summer. Members of both bands have since collaborated and Crowes frontman Chris Robinson has even toured with Lesh as part of his ongoing Phil Lesh and Friends project.

The Black Crowes actually have their own history at San Francisco's Fillmore, as they've made something of a tradition out of holding five-night residencies there since 2005, when they returned to the touring circuit following a hiatus. In 2006, they released a live concert film and soundtrack, 'Freak 'N' Roll ... Into the Fog,' taken from one of those performances and featuring, um, live jams.