The only changes I made from the recipe was to leave out the sugar and club soda, and add a full jar (8oz.) of maraschino cherries. Be warned: this must sit overnight to allow all the flavors to mix, so be sure to make it the day before you plan to drink it.
The end result is delicious! And potent, so be sure to have designated drivers for all who imbibe. Of course, Martha says that if you are serving alcoholic drinks at your parties, you must stop serving them an hour before your party is scheduled to end, and to have the names and numbers of area cab companies on hand for guests who shouldn't drive themselves home.
That Martha, she thinks of everything!
I say that you should serve this only to those people who you don't mind having crash on your couch, floor, recliner, front bushes, etc. Let them crash at your place overnight, and then they're there to help you clean up from your awesome party the next day. They'll be hungover, sure...but a hungover cleaning crew is still a cleaning crew! Enjoy!