That thread is hilarious....the quick rapid fire jump on the 'Attack Addiscombe CC bandwagon' was all to evident, maybe a few Norwood paragon's in there? Most were obviously not cyclists..as they'd at least have some understanding.........more to the point I wasn't out that day, so all those guilty stand up!
I've never actually been in the Coulsdon cafe which people tend to meet at these days but presumably that has a toilet if anyone needs it at start of ride?
The Coulsden cafe doesn't have a loo, but there is a public loo between there and CSS on the left. If you are in a group, one can guard bikes whilst the others empty their bladders.