Glen Hansard (of The Frames) and Marketa Irglova, the stars of the hit avant-musical film Once, are touring under the guise of The Swell Season and and playing a selection of songs from the soundtrack. The tour stops at the 9:30 Club Thursday with Amy LaVere and to celebrate, we’re giving away a pair of tickets to the show. All you need to do is fill out the form below with your name and…