Who: Jack, Xander, and eventually Kaylee.
Where: The Bar
When: Evening.
What: Xander finds out that he's minus one friendly face in the hotel, and decides to go the bar to cope in his own way.
Xander had gone to visit Faith, as he usually did on any day that ended in 'y', and found it somewhat strange when his key to Faith's room suddenly didn't fit in the lock. This caused him to knock a few times to no avail. Once he realized that no one was coming to the door, the alarm whistles kicked in his head and he forced the door open after a few well placed hits with his shoulder.
Xander wasn't quite ready for what he saw on the other side of the door. It wasn't any of the normal things he'd expect to see. No gruesome death scene, no dead bodies laying all over the place. Actually, it was the exact opposite of that, as the room was empty.
It was at this point when everything clicked in Xander's head. She was gone. The hotel had taken another... well, Xander may have at some point called her more than just a friend, but that didn't matter. The point was, she was gone, and now Xander was alone again.
It only took a while later for Xander to wind up in the bar, and for him to have broken into the liquor stash. The jukebox had found some old country music to set the mood, and Xander found himself sitting on the bar (the same one he and Faith had christened so long ago even), depressed and drinking.