newrow_ makes it easy to invite participants to your show.* Select the invite icon at the top--it looks like a person with a "+" sign.
You can type an email address in the To: box.
When you finish the entry, you can hit the space bar on your keyboard and the address becomes a separate entry block, so that you could type another email address.
You also have the option to edit the message before clicking on Send.
*Note: newrow_ provides this feature as a convenience, but the return address will show up as newrow_, which could cause the email to end up in spam/junk folders. A way around this would be to copy the meeting link from Meeting Info (from Settings, the gears icon) and send that link from your own email address.