Adapt And Survive!
The city is a harsh environment. It’s all about adapt-and-survive. If you can’t tailor your own behaviour to the demands of sudden change, then you’re doomed.
So when the authorities deem it necessary to install inexplicable rings on lampposts, and you’re a casual metropolitan dude in need of a good old lean, then there isn’t a moment to be lost. You must sieze the opportunity immediately, stake your claim and show no mercy.
Martini anyone?