Some more big red light district type buildings would be the King Hing Building in Mong kok and the Hop Yee Building.
There is so much to discuss and we don’t want this post to get too long.
The most famous walk up brothel would probably be the Fuji Building on Lockhart Road near the Wan Chai MTR.
It is a 22 story building with 18 floors full of one woman brothels.
Southeast Asians will be somewhere in the middle, but this can all vary. There may also be older ladies sitting outside on a stool next to some stairs leading upwards, hence the name walk up brothels.
You follow the stairs to the reception area and then get presented with a lineup of girls and choose the one you like.