I don't think you always have to invite every Anna to everything. Usually, there are somewhat natural groups that are relevant to invite, and you invite the Ann

I don't think you always have to invite every Anna to everything. Usually, there are somewhat natural groups that are relevant to invite, and you invite the Anna's that are part of that. So if I'm having drinks with colleagues, I'll also invite my colleague Anna, but not my former college classmate Anna. Nowadays this happens even more naturally, as my different groups will also be organised in their own Signal groups. So I'll just send a group message to my colleagues group, and there will always be people in there that never go - but they're welcome to.