In Marrakech (Dec 2012) the FoS group met. It consisted of 114 countries. The last meeting before this (in Istanbul, 2013) saw 11 countries turn up. I'll note that this current meeting in Amman saw those same 11 turn up again, which if nothing else tells you the ten countries that are most in the USA's pocket.....
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Iran denies it has forces supporting Assad in Syria