For instance, when a group of 8 or more people are going out to eat and you know that one person isn't going to pay for the entire meal, you should not ask the waiter for separate checks....ever. What you must realize is, that the person serving you your food is not waiting on just you, but that they also have other guests at 2 or 3 other tables that also need their attention. So when said waiter has to take time to separate your order into 4 or more checks that really slows them down. So please do the considerate thing. When you are putting a large party for dinner together, or even if it's "hey let's all go to 'Name of Your Local Dining Place,' and have some grub," every one should decide on one person to pay with a credit card, and EVERYONE ELSE should bring cash to give to that person. It's isn't hard to just pop by the ATM for a few quid. Or just always have a bit of cash on you just incase you find your self in a mass dining situation.
This is the right thing to do.
Look back here every week for discussion on restaurant do's ad don'ts and tips on common decency and etiquette for when you go out and eat.