TBIT walkway is always open, there's nothing to close off. I'd head over there, try and stay up until 1am to help passing out. From 1am-430am, nothing comes to mind immediately, just that I expect LAX to be fairly quiet. The TBIT connector would be very quiet, but there's nothing to sit or lay on. I think the AA gates have recliner chairs, right between the TBIT connector and the T6/7/8 connector tunnel.