I lived at CIUP (www.ciup.fr),I again found the Contact information miraculously on the UPMC website after Days and Days hunting around in that website. Which was only designed for French speakers.
CIUP is located within Paris region at and there is a RER trainsstation with the same name, Cite Universitaire. The train line is RER B and from CIUP to the city which in the inner city of Paris take approximately 10mins. You can even walk from CIUP to the inner city which takes about 35-40mins. The closest metrostation is Port Dórleans, the subway or the trainsystem in general in Paris is a bit compliated even for me after living there for about 5 months.
So I contacted CIUP from the UPMC website and from there on it was quite Quick on how I received a room there, and they asked for preferences if wanted to live in a studio, room with shared toilet and shared kitchen. At CIUP there are about 30 or more different houses. I lived at Fondation Deutch (http://www.ciup.fr/fondation-deutsch-de-la-meurthe/) and its location was perfect because it was Close to the trainstation as well as the supermarket. My first reaction to my building was that it resembled Harry Potter, with a Clock Tower and old Buildings.
The room i received was a room with toilet and then shared kitchen with my 12 other neighbours. The room was spacious and the standard was good. Fondation Deutch is the oldest building at CIUP and it was not unitl 2015 that they renovated the building and therefore the renovations were just finished Before my arrival. You receive a small space in the fridge and a cupboard both have the ability to be locked. However the was no freezer just a fridge, therefore no ice Cream stored in the fridge. Other than that, once every week there is a cleaner that Cleans your room. That empies you trash and vacuums and dusts your room. Then twice every month your sheets for the bed is changed. All of this is schedueled and noted on the notice board in the building. It was really nice with shared kitchen, that's when you met your new neighbours and sometimes you'd Cook with them and eat dinner with them. Sadly since Fondation Deutch is an old building, there are no elevators just stairs but there was only 2 floors in the building so it was managable.
Laundry. At Fondation Deutch there were about 200 students living there and unfortunately there were only four washing Machines and four tumblers. And again unfortunately you have to pay by inserting coins and every wash per machine was 3.5 euros.
Payment of rent. The payment was straightforward and extremely simple. If you are not perhaps planning on staying in Paris after your Exchange or start a membership deal at gym or other events or even for you mobile operator then you don't need to open up a bank in Paris. And to avoid bureaucracy simple DO NOT OPEN A BANK ACCOUNT, it will first of all take ages until you are able to open a bankaccount and then complications just get worse when you want to Close down the bank account. But back to the rent, I paid by credit card every month, just as simple as that. However, you need to be pushy for the administration to get their jobs done! It was extremely frustrating when they had not paid back the deposition free after 3months.
The location of CIUP was Close to my lab. I took the RER B train towards the city and it was only 4 stops between home and lab. Busses were also available to the lab, which is good in case of a strike with the trains which happened a lot in Paris.