Private clubs still exist, though, and they can still ban you even if all your friends are there. I'm also reasonably sure Discord can't ban you for being black or Jewish. They can, of course, ban you without giving a reason at all, but so can physical private clubs.
But you're essentially arguing that Willowdale Odd Fellows shouldn't be able to choose their membership, that everyone has a right to join the meetings.
The impact of Willowdale discovering you are gay and ejecting you is limited specifically because they (I assume) don't maintain a blacklist in coordination with Springfield.