SEAN ROCK & THE TOLTECS
9 p.m., Cornerstone Pub. $5.
See what could’ve been: Sean Rock & the Toltecs, who were among the 16 original semi-finalists in the Musicians Showcase, but had to drop out because of scheduling conflicts (and Rock’s reluctance to play without the band’s bassist Roland Gladden, who’s ineligible because he’s our operations director and videographer), play tonight at Cornerstone. For fans of literate folk-rock. Acoustic singer/songwriter Justin Teal Morgan opens.