Maybe I'm just weird, or maybe it is a function of geography (Seattle has a BIG contingent of YMOYL/FIRE-minded people), but I quite honestly cannot think of anybody in my immediate social circle who is big on consumer consumption. Maybe my brother and his family -- they have a big house in an expensive neighborhood, a holiday home in Italy, and sent their kids to top notch private schools. They probably spend a lot more on food than us because all of them are foodies. But other than that, just about everybody I know lives a pretty frugal, sustainable lifestyle. My immediate friend circle at the moment consists of:
Old friends from childhood/high school who I still click with
Grad school friends, still mostly in academia
Friends I've made through internet places like this over the years, quite a few of them now IRL friends
Friends I've made through my local Buy Nothing group
Friends I've made through volunteering
Friends I've made through gardening
I'm also friendly with several neighbors, though I wouldn't call most of them friends at this point -- could easily become that. I guess there are a couple of those who appear to be more consumption oriented, but they sure like it when I offer them homegrown cucumbers and tomatoes for free!
Anyway, just rambling here but I guess my point is that for those who struggle to find people who understand a FIRE-oriented, low-consumption life, maybe it would help to try to expand your social circle into areas where you are more likely to find folks with that mindset. Where you find a few people who enjoy having low-cost fun, you are likely to find more.