Nineties alternative-rock legends Smash Mouth, Sugar Ray and Gin Blossoms, on their summer “Under the Sun” tour, make a stop at the Greek Theatre, 2700 N Vermont Ave. and Commonwealth Canyon. They will also be joined by Vertical Horizon and Fastball. The five bands have cumulative sales of $25 million in the US. They will perform their 90s hits. Tickets, $50-$250, and more information online.