Since it was asked, I made some screenshots whithin the brothel in Whiterun's labor district.
It's from the mod "Whiterun Expansion_ Alternative Entrance" and can be downloaded from the Nexus : https://www.nexusmods.com/skyrim/mods/37403
I just checked and the mod's author is still alive (last login end of april 2018) although he/she seems not to be responding to his own mod thread anymore.
Excuse the lack of colors and vibrance, but I still have my usual dim light effects on and the quickest way to counter them for screenshots was a ring of night vision. *blush*
Yes, yes. I may enhance them later
entering the main room
Mysterious guarded door down in the basement
More pictures in the posts below...