A fun gag

djslack thought this was worth mentioning said
6

When you see a family taking a group photo, run up to them and say “no, all of you get in” and take the phone/camera to take their photo. This is good if it’s a member of their group taking the photo, they will want it. But even if it’s a bystander, don’t take no for an answer.

Have a cohort do the same, getting you into the family photo.

Repeat until they go beyond polite protest to absolutely not having it. I hope you have lots of friends around. And leave them with a set of photos of them and their rapidly expanding family of strangers.