Well... it's a spectrum from this to Jim Crow. Obviously it's nothing like it, but in the States we tend to say all forms of discrimination are socially unacceptable in order to avoid any slippery slope issues.
This is exactly wrong. Jim Crow and that spectrum is based on race and other prejudices. It's based on things people can't change (reasonably), and on "knowing your place" in society. This is the exact opposite. This is about personal relationships, connections, sphere of influence. This is not about classism, or racism, or any kind of prejudice.