Looking for a 90s US porn setting in a hotel

I have been looking for this movie for years. It was from a old VCD.
It was in a hotel or a motel. There was a man at the front desk checking in people, he often peeps through key holes.
The frist sceen was a woman checked in. She heard sex noises from next door, some one was slapping a woman's ass. She started to touch herself and picked up a red vibarator from the drawer and starts musterbating.
Then the camera cut to the next door. A woman was giving a man blow job and the man was slapping her ass. They then did anal.
I cannot remember what happened next.

The last seen was 2 men and a woman checked in. They had threesome.

The peeping guy saw all the sex sceens.

Can anyone help me to find this movie. Or tell me where I can buy it? Many many thanks!