This can be witnessed in many places even in main tourist areas they even go out of their way to meet and catch up, back track, hang around and wait.

When woodies meet up its like watching a pass the parcel game that undercover agents could learn from.

they greet each other as normal then there is the momentary look at each others hands/bags that look of what's he/she got for me.

then comes the moment a quick look around and the handing over of goods

a strange distinctive ritual then takes place

a quick general look

feeling the weight

rotating it to see if there are any special outstanding marks

then the strangest of all the nasal appraisal

with both parties leaving

Reports of this sort of activity have been seen all over the world