Say what should be argued and who should argue it. Asking is free. If you want to make it worth turning up for, you or anyone else can put money behind it.
Press a face to aim a call at them. Nobody here is affiliated with Debatable or has agreed to anything, a call they ignore is refunded like any other, and a name only appears on a live call once that person has accepted it. Portraits are Creative Commons or public domain, credited in the repository.
Press one to drop it into your call, and change a word if you want. Same rule as the whole board: go at what people do, decide and vote for, never at who they are.
Two things: what should be argued, and who should argue it. Everything else has a sensible default.