United Most Worshipful Scottish Rite Grand Lodge, Inc. (TX) - I ran into a "clandestine" mason from this lodge at work in our building.
I was an FC at the time at a lodge under the GLofTX. I didn't know any better and asked him what lodge he was in because he wore....pretty much everything you could think of that was masonic.
rings,sports necklaces, jackets, shoes, hates etc. You name it. At his lodge he was a 32nd degree scottish rite mason. Talked to me about the benefits of being a mason. Showed me his Dues card. Conversation came up. I forgot what exactly was said but it was something along the lines of "oh yeah my mentor mentioned the scottish rite down the street was the first here". He snapped back saying "No WE were the first." Conversation ended. Went to work on the craft with my mentor and he looked up the lodge.
Low and behold it was small lodge that wasn't in the book of lodges under GLofTX, and I was instructed not to talk to him about masonic stuff, also that doesn't mean he's not a "mason" just not a mason under the GLofTX.
What's interesting to me is that lodges like these exist, and I wonder why they do.