The two CouchSurfing guests that had a car left around noon. Their flight was earlier tonight so they ran an errand then went sight seeing on the Strip and what-not.
The other guest is hanging out with another CouchSurfing host in town. I think they went to a pool party or something. They didn't get back from that until late so he's sleeping over there tonight. The bus that runs next to my place doesn't run from 1am to 4am.