I agree with Blue Unit. This was a very worthwhile tour and a great one to start your visit to the French Quarter with as it will give you an overview of the area as well as get you into or past several high quality eating and drinking establishments.
Now, don't think this is just a pub crawl, cause it isn't. Joe, our Grayline guide, gave us a lot of insight into how the cocktail was invented by a French Quarter pharmacist and the word "cocktail" was actually a variation of the word for eggcup which the first fruit twist & alcohol drinks were made from etc. Not only that but you'll get to go into such great eating establishments as Antoine's, Arnouds etc and hear about their longterm history in the quarter, their very experienced waitstaff, etc and other great dining tidbits like where "brunch" was invented and so on. So, it's not only a drinking tour, but also a dining tour.
And as Blue Unit said, IF you want to have a drink at any of the stops along the way, it's on your nickel until the very last place at which Grayline buys a round.
Now, the guide will suggest a local favorite from each place you visit, but you are certainly NOT bound to buy that kind of drink there. You may purchase anything you like at any place, but we enjoyed the local suggestion, but were under no such pressure to do so.
As I say, a very enjoyable time; couldn't recommend the tour OR our tourguide Joe enough. Both were well worth the time and money.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.