The Foundation of Light accepts all religious and non-religious denominations, and they all worship together.  http://www.theithacajournal.com/news/stories/20050119/localnews/1886821.html
 
(It looks like a move toward the umbrella of a one world religion that tolerates all faiths.  Maybe they should have named it the Foundation of the Angel of Light which is another name for Satan.)
 
Here is an example of another group that recognizes all world religions.
http://www.winchesterstar.com/TheWinchesterStar/050119/Area_circle.asp