Alt rockers Modest Mouse to play Jannus Live in St. Petersburg this fall The respected band with a cult following has had sold-out shows in recent Tampa Bay appearances. Â Â Singer Isaac Brock of Modest Mouse headlined the 2015 Gasparilla Music Festival in 2015 in Tampa's Curtis Hixon Park. The respected alt rockers with a cult following will play Jannus Live in St. Petersburg this fall. [ JAY CRIDLIN | Tampa Bay Times (2015) ] Updated Yesterday Alt rockers Modest Mouse, a respected band with a cult following, will play Jannus Live in St. Petersburg on Oct. 16, one of the first big bookings for the downtown venue since the pandemic shut down concerts.