Founded in 1822 in the UK by theatrical people. It spread as actors moved about the country. Today it is one of the largest fraternal organizations in the UK. The “Royal” in it title is as fictitious as the “Antediluvian” but the Buffaloes are allowed to use it due to grandfathering.
The organization spread, largely through the British Commonwealth. There is a Grand Lodge of Ontario and a few local lodges.
Membership is open to all males over the age of 18 who are willing to declare that they are "true and loyal supporters of the British Crown and Constitution". Politics, religion or gambling is strictly forbidden at gatherings.
Click for a list of Buffaloe Lodges, etc in Ontario
References:
http://www.raob.org.uk/
http://www.freewebs.com/hamiltondistrictpgl/grandlodgeofontario.htm