Also agree it does look like a mix-match of different rooms and props. Finding the individual props will be a pain, so it's probably best to ask the author if they're present on here. Alternatively, if it's a popular game, it may already have an Assets section in the Artwork sub-forum, so things could be found there or you may be able to get some help.
I notice that you looking to identify a lot of assets, so if the Assets thread for the game doesn't exist, it's probably worth you creating one. You may also find other artists looking to create fan works too, so that may divide your workload in identifying the assets needed.
And I feel like I've seen those rolled up towels before.
Lol, they're from the same set as the Z Massage Room (along with the shelves they are placed on) so probably explains why they look familiar