I found this webinar to be very informative; the presenter is very clear in his explainations and has some very good tips to share. A few times I even went...bingo!
It's called "How to talk to strangers" and it does cover that aspect but it's much more comprehensive...
How to Talk to Strangers: 7 Tips For Photographing People - YouTube
It's called "How to talk to strangers" and it does cover that aspect but it's much more comprehensive...
How to Talk to Strangers: 7 Tips For Photographing People - YouTube