Ready-made
All-hands
A head count before you book the room.
One question, one link, and a number that is not a guess. People respond without signing in to anything.
Start oneIt opens with the rows already in place. Change any of them before you share it.
An example
- 64 coming · 9 maybe
Other templates people use
Ready when you are
A minute to set up, and nothing for anybody else to install.