Every (ish) Thursday people play Four Square in the Rockridge BART parking lot near to the jousting sessions. The games can be quite competitive and often are populated by hipsters.
The group is technically called 4 Square East Bay.
(this is totally separate from Foursquare, the phone app)
External Links
- "Playground’s “4-square” goes grownup in BART lot." Oakland North, 2008
- "Four square for adults at Rockridge BART." Oakland North, 2010