You can also book them at Guest Services, but we found that when you do it that way, they are likely to say something like, "What tasting do you want?" and then assign you a day and time. Whereas if you go to the proper bar, the guy/gal pulls out the whole sheet and you can see all the times that each class is offered and pick the ones you want. I was still able to get the times I wanted from GS, but I had to play "20 questions." Is that offered any other time? When? Can I do that one? What about so and so tasting? When is that offered? When else? Etc.