> because you're stuck together for the night. You can't just sit out a game/map if you don't like it, you can't just hop on a different voice channel and play another game with other people.

Probably depends on the size, but even our tiny LANs we had some groups preferring some games, other's preferring others, and plenty of other activities others were doing throughout the LAN. The group that managed the LAN I was familiar with was really into medieval costumes, events and roleplaying, so bunch of chainmail making, clothes making and what not going on at the same time while others play BFV or Starcraft, or people sleeping under the tables.