The tastings are organized by
DCL and hosted by one of the bartenders. Most of them are $15, but some of them are more expensive (champagne, chocolate tasting, etc.). I think the most expensive ones run to about $30. For the Martini tasting you get 4 half size Martinis in different styles. Usually there is a classic Gin Martini with the option to turn it into a Dirty Martini, a couple of fruity Martinis and a dessert Martini of some kind (chocolate or coffee). For the Tequila and Margarita tasting you get three shots of various ages and sometimes also a coffee flavoured Tequila. You also get two half size Margaritas. In all the tastings that I have done, I got one classic Margarita and then a fruit Margarita (Mango, Strawberry, Key Lime, etc). Mixology seems to change from cruise to cruise. Sometimes you make your own cocktails, sometimes you are given a range of cocktails and volunteers are asked to help to make them. In any case you should get 4 or 5 different cocktails and it is fun and educational.
Corinna