I hope this explanation will make sense:
First off, my class is divided into 6 groups/tables: A,B,C,D,E,F. The tables take turns asking "Is this (letter) group?" The group whose letter appears says, "Yes it is." Then click to see what the first group says( ie "Let's play soccer"/"Let's meet at my house at 3:00"/etc) The other group replies with "Sounds good" or "Sorry I can't.
**The group's letter who asks "Is this...group?" is in the top left corner.
And here are two PPTs with the key expressions. I used them for the first part of the lesson.