Well, it was for an alcoholic beverage. I actually didn't think that at the parks they expected tips for serving drinks (it was one where they mix drinks not just serve you a bottle) but then I saw a glass container that had dollars in it and the guy in front of me put one in. I think the guy noticed me digging through my change purse cus my drink was $5, but I only had $4 and was looking for 4 quarters which I had instead of breaking a 20, but then he took my i.d. and started flirting with me about how it was a great picture of me and blah blah blah. I know it's a typical bartender's ploy to get tips, but I felt compelled to tip him after he called me pretty. That's kind of a cheap tactic, but it worked I suppose. You were probably ok not tipping at the coffee carts.