Greetings Do give a firm handshake and a double or triple cheek kiss.
Marijuana & alcohol Don't smoke dope or drink beer on the streets.
Smoking Don't smoke (any substance) in bars or restaurants.
Bluntness Don't take offence if locals give you a frank, unvarnished opinion. It's not considered impolite, rather it comes from the desire to be direct and honest.
Cycling paths Don't walk in bike lanes (which are marked by white lines and bicycle symbols), and do look both ways before crossing a bike lane.