I'll go with the bowling alley.

you head over to teh private bowling alley, where the students organize games. you notice that dan is dangling off tiffany like will ferrel with nicole kidman's broom in that darned "bewitched" commercial. you sit in the back of the alley, watching the games and thinking about melissa, the pool, and tiffany. especially tiffany.

in the corner of your eye, you see two figures in one of the back corners of the huge bowling room. naturally, you go and see what's going on.

you get a closer view, and you're sure that no one can see you. you can now make out daniel and tiffany in a corner, and you notice that she's lost the shirt and skirt. she's standing in front of him in her lingerie, and you have to admit, you'd give anything to be dan right now. you decide to watch this, as its more interesting than the games of bowling.

10 min later

you see daniel motion for tiffany, pointing to his lap. she smiles and licks her lips. they both are in the nude now. she mounts his member, fully erect at the sight of her naked, and he puts one hand on each side of her abdomen, large hands nearly encompassing the tiny waist. he then begins to move the 105 lb. blonde up and down his member. you hear "oh yeah, baby," and you're about to look in closer, when you feel a tap on your shoulder. a manicured hand pulls you over. "so, you're a voyeur too, huh?" melissa questions. "you could say so, ya." you reply.
she turns and kisses you gently on the lips.