I went there a few days ago in the day time but they would not sell me one chip.
The guy on the floor said gaming starts at 11:00 pm I believe, but I haven't gone back.
Interesting place. I didn't even think the place was open, but it was.
Good Luck if you go. I don't think I would feel very comfortable walking in the area alone at night though.
Matchbooks are the same as the Plaza, as they own the place, maybe they will eventually spruce up the place.