*Katiebell waits for the stroganoff to hit the fan...*
bicker is totally correct, this has been discussed, quite passionately at times, on numerous threads.

I'm sure it will continue to come up though. And the statistics he provides are usually right on the money, and help to explain things from the restauranteur's point of view regarding costs.
As I explained in post #6 above, I found that splitting meals and buying a few extra items would end up costing us more.
People
do share at restaurants, routinely. Of the 10 appetizers on the Raglan Road menu, 7 of them are listed as "Starters for Sharing (for two people)". Ghirardelli's serves an Earthquake Sundae for 24.95 and Beaches and Cream serves the infamous Kitchen Sink for 21.99 -- both of which are designed for more than two people to share.
For portion control purposes, some diners wish to share extremely large entrees, even if it does not state on the menu specifically that the dish is for two people. Shula's Steakhouse at the Dolphin says right on their menu there is a $10 plate splitting charge -- which is not unheard of, given their prices. And surely they must
expect guests to share menu items like their $75 48 oz Porterhouse -- I can't imagine many diners could hope to consume
three pounds of beef in a meal. It would be like the steak Fred Flintstone ordered at the car hop restaurant that tipped his car over

Even split 3 ways, it would be 3 enormous portions of steak. Shula's is an extreme example, though, and isn't even on the dining plan. Entrees at other restaurants may be large, but I doubt there's anything that extravagant.
Although...if you went to an all-you-care-to-eat buffet...you
could just ask for the entire prime rib at the carver's station...tell them, "I care to eat
all of that meat," just to see the look on their face