The Regent Theater, 448 S Main St, Los Angeles. June 9th. Flawed Mangoes — the Killswitch Memories Tour, at the Regent, which is exactly the right size for a band that rewards a room that can see the whites of their eyes. The Regent holds around 400 people on a good night, and for bands at this level of the indie circuit, that capacity is the sweet spot: close enough to feel the room, large enough to generate the crowd pressure that makes a live show feel different from a playlist. The Killswitch Memories tour is a named tour, which means there's a concept and a setlist organized around it …