If you know East London, Corbet Place is around 3/4 the way up Brick Lane (if you're coming from Whitechapel to the south) - if you get to Quaker Street, you've gone too far! It's on the edge of the Truman Brewery Car Park.
Find it on Streetmap
If you don't know your way, might I suggest that as many people as possible make their way to Algate East tube station for 6pm and stand outside the station with a "I'm lost and I want to go drinking and watching a Robert Anton Wilson film" look on your face. Then you can all walk up together. Kind volunteers might want to take on the role of Pied Piper and lead you to the doom of your dogmatism.