Newcomers book week one of a block, pick lead or follow, and only get a place where that side has room.

Week one of a block by default, open classes too if you like, every block or only the ones you tick.
Your price or none. It can come off the block if they join.
One per style by default, or one per person, or one per course.
Their place in the block waits 14 days, then goes back on sale by itself.
A try-out only books where their side has room.
Nobody lives on try-outs.
Joined, still deciding, or never came.
No. It only books where the newcomer's side has room.
One per style, per person, or per course: you choose.
No. They can book on the web from your school page.
Put your Tuesday beginners on Dansly, leave everything else as it is, and see whether anyone still has to text round.