I did have a $35 drink there about 7 or 8 years ago, but it was the size of a soup bowl, then another came with it. It was basically 6 drinks, which ended up being a good value. (If you want 6 drinks.)
Dad stayed sober, with a couple of light beers only, so extras on the bill would have nixed quickly.
I wouldn’t call it a tourist trap, per se, just the cost of doing business on South Beach!