It varied with location and time.
March 2009 in Wilkes-Barre, we had Chloe and Mairead N. A few days later in New York we met all 5 ladies.
June 2012 in Portland -- Chloe and Susan.
Atlanta in 2012, they had 2 M&Gs because 2 PBS stations were involved. Lisa L. and Mairead N. were in one room and Chloe and Susan were in another room.
Las Vegas 2013 was all 4 ladies (Lisa L., Susan and both Maireads).
They split them up into different rooms at the same time for different PBS stations? Are you serious?
Wow.
That almost feels like collecting Celtic Woman Trading Cards or something. "Oh man, do you have the Lynn card? It's super-rare!" "No but I do have the Deirdre card. You can't even get that one any more!" Lol.