I asked and was told the £60 included the gratuities. When I did a test run the price was in dollars totalled less than £60 per day and the difference in price was the gratuities so I could have purchased it without the gratuities at a lesser cost than £60 per day or could have added pre-paid gratuities and both packages (in dollars) would have totalled £60.
Hope that makes sense.
I too do not drink much alcohol, maybe a couple a day, so am weighing it up, however, the cruise I have booked have a lot of sea days during which I could drink a few cups of coffee/tea.