if it were me, i would do all of these with it
-get 3-4 friends in a large asto-van type vehicle *any large van with no seats will do* roll up atleast 1-2 blunts for each person, and pack a few bowls. Make sure all of the windows are rolled up, then bake out the entire van, untill there is a HUGE haze in it, again, open no windows. Drive to the nearest mcdonalds/bk/arbys or whatever, and place an order, then, when you drive to the window, turn on all the AC vents and point them toward the drivers window, and roll the window down once you get up to take your order. Not only will this be funny, but you will probably get the worker blown from the massive contact buzz.
-Buy a huge keif tray, and shake the hell out of that weed. Save all the keif, and at random times during your smoke-athon, scrape the resin from your bowls. Save the resin, and when you run out of bud, smoke keif sprinkled resin balls.
-Play weed pong. Freeze some glass cups, then shotgun a joint into the cup, the smoke will stay in the cup unless sucked out. Set up beerpong as your normally would, but when you sink a cup, they have to smoke it.
-Invite 4-5 friends over who can smoke the night away and have a smoke off. Just keep a stack of 4-5 rolled joints for each person, and compete in one on one battles. First person who has to stop looses, next person advances. The winner gets firsties for a year when you smoke with those people, and gets to resin hit the bowl as much as he/she wants after every smoke session

thats all i can think of right now, but try those, they will be fun