I'd work with one of the friends to plan a "party" for sometime Christmas day so you all can meet at one place if possible? I go to my stepsister's Christmas Day, the one day a year I see my nieces/nephews and their children, my stepsister and her friends (she's 13 years older than I am but my father married her mother when I was 5 so I've known her over 50 years). Give everyone the task of bringing something to eat (I'm in charge of bringing a ham to Christmas dinner each year) or an activity/game idea, some simple crackers/decorations? The final effect could be the memory and everyone working together.