[maybeiambatman]

Most country clubs in the US will have different initiation fees and monthly dues based on age. How do they get away with it?

[gnopgnip]

The civil rights act, the ADA only apply to "public accommodations". Many country clubs are not open to the public, they won't provide services to non members and aren't covered by the laws that make discrimination based on age or other classes unlawful.

[judge2020]

Same with how nearly every theatre in the country charges less for children and elderly patrons.

[thaumasiotes]

That one's easy; "age" is not a protected class. The protected class is "people over 40". Discriminating against young and youngish adults is fine.

You might try making an argument that theaters have to give you senior pricing as soon as you turn 40; I don't know what's going on there.