My older kids enjoy having their friends sleep over. I shouldn't really say "sleep" since no one does too much of that. In cold weather, most of their time is divided between eating and playing video games. 
The girls are very single-minded when it comes to playing games. While we have a big variety here--a good bunch of Mario games, Wii Sports, Animal Crossing and more--the only game the girls want to play is Dance Dance Revolution. They could dance all night. And even though only one player at a time can use that game (we've only got one mat), all the other girls line up next to her and dance right along. The game, for them, is definitely second to the social time that a sleepover (or as one of my friends calls it, an "awake over") provides.
Boys play very differently. When it's not their turn to play, whether it's Guitar Hero or Grand Theft Auto, they'll wander over to the computer and play a game there. At any given time, there could be two or three different games happening--sometimes they'll even get a two-player game started on the Nintendo DS.
In general, the girls are noisier. I don't hear too much from the boys when they're here, unless someone has commandeered a cement mixer in GTA. And when the boys finally tire of gaming, they don't sit around and giggle loudly. They go outside and stage a light-sabre battle, or take aim at each other with marshmallow shooters.
The rule around here is that if they wake up their little brother, they have to play with him. So far we haven't had to make good on that threat. We adults do generally get a decent amount of sleep, especially since we try to space out these sleepovers so we aren't hosting more than one bunch of kids on a given weekend. Generally, though, we don't mind hosting. We get to know our teens' friends, and we know where they are and what they're doing.
And around 4 AM, no matter who they are, they'll grab a blanket and pillow and conk out. We'll wake up in the morning to find them sprawled all over the room, and try not to trip over them on our way to make breakfast.
COUPON TIME
Almost any teenager will tell you that you can never have enough video games. Try these deals to complete your game collection:
Free Value Shipping on orders over $25 at EBGames.com 
Enter coupon code SAVER in your cart and click "Activate."
Valid through: Unknown
Only one offer per order. Not valid on consoles & console bundles. Applied at checkout.
20% off strategy guides at EBgames.com
Purchase any PC or video game over $29.99 and get 20% off the strategy guide. Enter coupon code 20GUIDE in your cart and click "Activate."
Valid through: Unknown
Free Value Shipping on orders over $25 at Gamestop.com 
Enter coupon code SAVER in your cart and click "Activate."
Select USA Value as your shipping method
Valid through: Unknown
Excludes consoles & console bundles. Only one offer per order.
20% off Webkinz at fye.com 
Use this link to view the promotional code.
Valid through: unknown
$15 off your order when you buy 2 Didj Games at LeapFrog.com 
Use this link to view the promotion code. If there are any problems, enter ja9ddj in your shopping cart. Discount will appear during checkout.
Valid through: February 4, 2009 11:59pm CT
10-day free trial at GameFly.com 
No code necessary. Rent unlimited video games from GameFly's 2,000+ library of titles. Play 2 games at a time. No due dates or late fees.
