Cabanas are pay by the hour sex motels. I love them. They usually cost around 500 pesos for 3 hours. There are basic cabanas and then deluxe cabanas that are 2 stories, have swimming pools and jaccuzis, stripper poles, etc.
People live at home until they are married, so they need a place to have sex. Married guys need a place to cheat on their wives.
Basically it works like this:
Pull you car into the garage
Shut the garage door
Your chick will get out
Enter the room
The phone will ring
Order a presidente light
Bell will ring, go open the box, there is your bill and beer
Put your money in and spin it around (picture attached)
Bang your chica for the next few hours
Cabanas have a/c, hot water, porn, room service