High-tone hijab?

A posh country club in a posh part of the Portland, Oregon, area is unwilling to let guests wear jeans on the premises. The Doser would like to know what other code restrictions the Oswego Lake Country Club has. Kitzhaber probably wears jeans to claim an association with blue-collar people. Does one assume that the kitchen workers, grounds-keepers and caddies at this fastidious club are not permitted to wear jeans also? So they have old-timey rules. The Doser wonders if they also have prudish rules and maybe even bigotry rules.