The popular jam band arrives at the Beachland Ballroom tonight for the first of two shows in a two-night stand. The current tour supports Underdog: The Acoustic Sessions, a 16-track album that features seven new songs and nine "fan favorites." Tracks such as "Locust Ave" features Sublime-like cadences as the group embraces a reggae sensibility even when playing unplugged. Tonight's concert begins at 8. The Grilled Lincolns and Higher Education open the show. TobyRaps, and C-Level open tomorrow night's show, which also commences at 8.