The Somerville pop-punk band Bad Idea USA is the headliner for tonight’s live music at Deep Cuts Deli and Brewery in Medford Square. Also performing: Pink Slip, The Jacklights, and Blame It On Whitman. Doors open at 7 p.m. with the music starting at 8. Tickets are $10 in advance, $15 day of show through Eventbrite.