The Sims 2 Nightlife Expansion Pack is rated Teen for Crude Humor, Suggestive Themes, and Violence.
This expansion pack is great for the partier at heart. It creates a downtown feature to your already exsisting town that you've created in the game. The downtown has clubs, cafes, resturants, bowling alleys, and more! You can ever live in the downtown area.
I cool little add of with the expansions is you can use all the new items used in the downtown in your own Sims home. You can even have a car now thanks to this expansion!
If your Sim is downtown and happens to get to friend with the wrong people they can be turned into... wait for it... a vampire! They make this sound like a bad thing, I think its wicked, lol. But yes you Sim does suffer if out in the sun. There stats will fall quickly and your Sim will die because of it. It's ok, they did make coffins available for a bed.