I have been a member of a book club for over 40 years, in which new members have come and gone over the years. Each month we go to a different restaurant often in keeping with the theme of the book we are discussing. When the club first started the total restaurant tab would be split amoung all the members who were present. As we aged vaious issues (primarily health) emerged which caused various people to stop drinking alcohol. When it became highly divided, we discussed it and decide to have the servers seperate the liquor bill from the food bill. Again the bills were divided by the participants. Further aging revealed food algeries and health issues that required dietary modifications We all value our time together and so decided to have seperate checks. Since we are a large group, we alway meet mid-week and make reservations in which we specify that we will require seperate checks.
We are now in out 70,s and 80,s and neither the members nor the restaurants are being inconvenienced. The value of lifelong friendships has survived health and financial issues that may have seperate us.