I have some experience as a poor white kid on the periphery of a middle class white culture. I didn’t feel particularly excluded, just that their world of camps, trips, exchanges etc was completely outside my experience and I would no more have signed up to one of their events than I would have thought of flying to the moon.
The root of the problem is in the underlying question of what can “we” do to get “them” involved in “our” activities. It’s not going to happen.