I have had so many cases lately with big parties on who pays the bill. Often the people visiting want to pay as a way of saying thank-you to theirs hosts. While the hosting couple want to pay because "they are hosting their guest". As a server, I have to pick whose credit card I use to pay the bill. I always accept the credit card from the person who tells me first that they will take care of the bill. Sometimes this offends the second party. Is this good manners for the server to do this?