High Quality Content by WIKIPEDIA articles! The Sims 3: Late Night is the third expansion pack for the strategic life simulation computer game The Sims 3 and is similar to previous expansions The Sims 2: Nightlife for The Sims 2 and The Sims: Hot Date for The Sims. It incorporates some elements from The Sims: House Party, The Sims: Superstar, and The Urbz: Sims in the City.