There are parts of cities that practice financial discrimination and one cannot buy in there without the necessary dosh and if you aren't wanted then they will up the counter offers to the point where you can't afford to buy.
I don't know what this "up the offer" situation is, as I've never seen it. Any examples to help me out?
There is much discrimination by finance, but, the theory goes, anyone can get a job that earns them money. We all know this is not true, partly because there are socio-economic obstacles for some people in getting particular types of jobs, and also because not all jobs pay the same wages so someone will be paid less and not be able to afford anything. You could address this type of discrimination, but it is more about addressing the logic and workings of the economic system than it is about actual discrimination. This sort of discrimination is not discrimination by others based upon a salient feature, especially not a salient feature that has no effect on the discriminator. Instead, this type of discrimination is all about the effect on the discriminator - the discriminator would not get their payment, for example. So they are similar in a way, but also very different, and are solved in very different ways.
Then there are the Communes that practice the same sort of discrimination but in a lower value range and others where the vote of but one member, and that without any reason being given, can stop a person who has the cash from buying in.
Yeah, this is true. There are communities that can select their members because the community is structured as a formal institution. As always, I think it should not be the case that race, sexual orientation or identity, marital or family status, or religious views should stop someone entered such a community (as also with employment), but they probably exist.
I get to choose my friends, but I don't really get to choose my community. I do, however, get to choose who and how I interact with people in my community, and I think that is the best way to do it.