I just made that up hahaha. Like my silly sense of humour?
Just in the last day someone told me about this video - The art of the bise (unfortunately it's in French which doesn't help foreigners by hey, you could improve your French at the same time! ;) ) It talks about when, with whom, how many and all the subtle little nuances... Personally, if I've never met the person before I give them a handshake. Often, they will be the one to initiate a bise but I never offer first.
On that note, I also usually wait to see if the other person will tutoie me first. Sometimes I suggest it, particularly if they are around the same age or younger than me and most are happy to tutoie each other.
and also yesterday I came across this link with a map of France and how many they do in each region. If you've been following my blog I spent many years out of France but we did 3 and now in Lyon they do 2. When I first arrived and started doing 3 people would look at me awkwardly or even laugh before they realised what was happening (without me having to tell them why). A bit embarrassing but it makes for a funny conversation afterwards though! :D