SimCookie was able to attend a special event held in Paris that showcased The Sims 3 Late Night, and they brought back their report from the time spent with the game.  A huge, huge thanks goes to InfiniteSims for translating it to English so I (and you guys) get the chance to read it:

The game finally launched! The loading screen started with beautiful city scape, slowly turning and a night sky filled with stars.  Finally the loading finished! The main screen has remained unchanged, this is where I chose the Bridgeport neighborhood, which is the name of the new neighborhood. Bridgeport is a totally independent neighbourhood! The neighborhood is divided into two parts; the first part of the neighborhood covers downtown while the second part is a quieter suburburban area where people can pose as celebrities. I think BridgePort still looks a little like New York, with billboards and advertisements on the buildings, even though the developers said that there would be no advertising in the game. There are new areas, new life, new looks and new buildings! From what I saw from my time playing the game, the buildings were very different, it looks very nice!