Share 'Chocolate Tastings'

I'm going to be doing a series of Chocolate Tastings in the fall at stores that will be carrying my chocolates. I've never been to a formal tasting like this and I'm looking for some direction. How many of my chocolates should I have available? One of every kind or just a select few. Should I give some sort of demo?  Talk about the different types of chocolate and ganaches involved in my work?  M…