I can't tell you what cars attract women, but I can tell you what the cars I own attract:
MGB: Young women, drunk 20 something guys, and old men who wear wool sport jackets, and typically smell on pipe tobacco and cough syrup.
Volvo 240: Old women who have way too many cats. I've had a lot less customers on this one, after I slapped a few bumper stickers on it.
Volvo 850: Ricers, and guys in pickup trucks wanting to race.
240Z: People of both sexes and all ages seem to like this car; sort of an all-star.
Dodge D100 Sweptline: Guys with beards, and girls in tank tops. Or, maybe I just hang around guys with beards, and girls that wear tank tops. Who knows. I haven't had this one long enough to make an educated statement.