Well, for one thing, I don't think a pink cab will sway some girls. My girlfriend would really take offense to this thread since you think painting it pink would make a gal like it

It really depends on your lady... does she like games at all? Some people just can't be swayed or interested in some things. For instance... you will NEVER see me interested in soccer... just won't happen. Perhaps if only hot, naked women were playing, but even then, I'd wonder why they were bothering with that stupid game (my opinion, apologies to soccer fans).
My point is: Is she one of those people who just doesn't see the point in games, no matter what you try? Then you may be out of luck. No paint or leopard print will change that.
If she isn't like that: Try to get her interested in the games themselves. Or, make a cab and only load the games SHE likes. My gf loves a lot of games, so I'm lucky in that regard. If you can find some games she likes, and emphasize those... maybe use those game characters as art for the cab, etc, you'll be better off.