Next door to today's first concert pick, fun. will headline The Basement, 391 Neil Ave. I was surprised at just how much I enjoyed this band's "Aim and Ignite" because I thought they were a little more Warped Tour than the indie pop party they turned out to be. Steel Train and Jarrod Gorbel open the sold-out show. Doors open at 7 p.m., and for you scalpers, face value is $15 per ticket.