(ERC stands for Every Rider Crashes)
Other ones I know of (I expect there are others) -
CTC have various runs, including a hard riders run every Sat that regularly tops 80 miles.
Ronde (think Rapha on Pinarello) have a popular run from their premises in Stockbridge every Sat.
Also runs from informal clubs Portovelo, Pentland Velo, and Dalmeny 801.
A little further afield, I expect Peebles CC would have a run. And to the West, a variety of runs from West Lothian Clarion and Livingston CC.