lol dude, there's two things i'm thinking here... one you fit the description (car, amount of people ect) of someone they were looking for that night, and really wanted them, (i.e. stolen car, or robbery maybe? same shit happened to me, cops tried to pin a robbery on me, my bro and a friend.. well that's another story) and upon approaching your car, they realized you weren't what they were looking for... (if this is true, consider yourself very lucky) or, they just felt like being nice and letting yal go, thinking you pose no real danger (either yal didn't seem very drunk, or the cop was an idiot lol) probably because of upcoming holiday season..