The best way to join Rostrum is to come along as a visitor. There is no obligation to join and this way you can get a feel of how the meetings run without the pressure of having to give a speech, although you are more than welcome to participate if you feel comfortable.

You can either just show up at the meeting in the morning or if you prefer you can give us a call, at least this way you won't feel like you are walking into a room of total strangers.