Gypsy matchmaker

The Gypsy Matchmaker is an NPC that came with The Sims 2: Nightlife and The Sims 2: FreeTime. The Matchmaker can summon a blind date for you (your compatibility with your date depends on how much you pay the Matchmaker), or sell you a cures for Vampirism, Lycanthropy (Pets), Witchiness (Apartment Life), or PlantSim (Seasons).

In The Sims 2: FreeTime, if the lifetime meter of everyone in the household is high, the Matchmaker will sneak over to the house during the night and leave a Genie lamp.

The Matchmaker is an unplayable NPC (barring hacks), but can be befriended and fall in love with a controllable Sim. However, the only socializing actions allowed with the Gypsy Matchmaker is under the Talk, Flirt and Influence menus (which is much more limited than the Influence menu of a non-NPC Sim). She will stay on a Sim's lot for hours at a time, until she is greeted.