1. Any person that qualifies any of the mentioned cars as "chick cars" is obviously trying to compensate for something. No matter how you slice it Boxsters, 911s, Corvettes, Vipers... they are all great cars that are a blast to drive (well.. I'm assuming the Viper is fun to drive, I've never had the pleasure). The only way you won't have fun in any of these cars is if you are a crappy driver.
2. A boxster is a chick car. Drop the top and drive (slowly) down a scene-ster part of town on a Friday night, and you will get attention from females. One girlfriend told me that if a guy has my car she is and I quote "About 50% more likely to go out with him". Would I marry this kind of girl? Hell no, but I will take her out in my Boxster
