Extra room and bathroom for the maid is the norm. It is usually next to a laundry room, which is next to the kitchen. It also usually features a second rear door that is mainly used to put the rubbish out and by the maid and deliveries.
The buildings usually have two lifts. One to be used by the residents and visitors and the other by the maids, delivery people and employees such as gardeners, cleaners or the people who stay at the gates controlling who comes in/out and answering the intercom (not sure how to call them in English).
The lift for residents and visitors is nice with huge mirrors.
The other lift is usually slightly less nice and no mirrors 
The division of class, still is a BIG thing in Brazil and it is to do with money, skin colour, and even hair type in certain parts of the country.
Generally speaking, in the East, the poorest are African descendants or mixed with African descendants...they go to great lengths to straitening their naturally curly or afro hair so they will look less African. Unless they are somehow involved in culture and arts when it is cool to show and embrace your roots.
Brazilian people are obsessed with beauty, as someone said above and the men and women look down on women who don't regularly get their waxing, pedicure and manicure done. As well as the hair of course.
As we were visiting a very poor city in Brazil, with a beauty salon popping out in every corner, my husband wisely observed about the inhabitants:
"They may be poor, but they look good"

In Brazil we have a culture of paying by credit card in instalments. If you don't have access to a credit card you can open a tab at a store. This way, you can pay for your clothing, shoes and make up in 12 instalments or even 24 if it s something expensive.
As opposed as the 'saving' culture we have over here, there they have a 'debt' culture.
Oh, and if a typical Brazilian (I am not generalising of course) buy something with a huge discount or very cheap, they will lie saying that it much more expensive than it actually was...
It is all about showing off the money that you don't have.
Here we brag if we find a good bargain right?