You really cannot predict when the Mixologies or other adult tasting courses will be available based on past Navigators.
It sounds a little like you're trying to plan a la a parks trip? Planning a cruise is going to be a lot different. Most of the on-ship schedule simply won't be available until you're ON the ship. There are some things that are quite predictable, like the AA meetings on board, but even movie times are going to vary based on what they're showing. The music in the atrium and some of the performances in the clubs, the time will be the same, but what they are will vary. Even the dates/times of bingo may vary.