If you take two cities and compare their median incomes, the one with a higher income will tend to be more tolerant.

That does not mean, within the city, the wealthy are more tolerant than the poor. It’s a system effect. When tolerant people densify, they become more productive. This might be because they can exist more compactly. Or it might be something about how interactions in a tolerant society work.

The country club analogy was solely an equivalence of cost. If I were in Tulsa, I imagine I would have to pay that much to get access to the restaurants, theatre, arts and clubs that I take for granted in New York.