Feature Request: On Demand round robin tournaments

It would be cool if lichess had on demand round robin tournaments with anywhere from 4-10 players. Once one of them filled up, a new one would be opened for registration. There could be open ones, and also ones with a rating range. This is a feature that the FIDE online arena already has, and it is quite nice.

I support any expansion of the tournament options. Especially any option for creating correspondence tournaments.

I was going myself to ask for this feature!
I'd love to challenge friends in a correspondance tourney.