https://www.sleepinginairports.net/guides/los-angeles-airport-guide.htm 顺便说句 LAX TB应该是24小时的，不让你过夜的意思大概是不让你提前很多小时check in
That said, there are a few benches and couches scattered throughout the terminals. In Terminal 1, there is a long bench just past security at the top of the stairs. In the Arrivals Hall of Terminal 6, there are armrest-free benches – though it can be particularly bright and loud here. There are chairs in triangle configurations in Terminals 4 and 7 that are decent for a rest. Gate 148 of TBIT also has a few couches.