From the sfbike.org website:
Answers to commonly asked questions:
What's Waving Wednesday?
It's a simple concept! It's Wednesday and you're riding a bicycle. You see someone else on a bicycle. You wave to them. They wave to you.
Does it cost anything to participate in Waving Wednesday?
Waving Wednesday only costs about 3 calories per wave.
If I wave on Wednesdays, can I still wave on other days?
Waving to promote camaraderie among cyclists is always encouraged.
What qualifies as a wave?
A wave 'counts' when you move your hand back and forth at least 3 times. Nodding or saluting do not count - those salutations can find their own darn days.
Do I really have to do this?
Yes, you have to.
You can GO HERE to print out your own Waving Wednesday bookmark fliers to pass out around town and spread the word.
Now get out there and remember to wave!