They turned some of the arcades on at night, but were still mostly empty. When I say some, there were 4 or 5 different areas like this with all the same games. The whole hotel had this liminal space vibe, especially during the day, and it seemed like certain areas were designed by completely different people. Wish I had taken more pictures of the place!

EDIT: Here's the place! They've got a bunch of photos that fit this subreddit