This is the dumbest thing ever, there are exact measurements of drink you get in your cocktails. While it is still extortionate, the ice is not the problem
Actually there is, the bigger the ice the slower it melts. So unless you want a drink that is 25% water after 25 minutes, you'll want as much ice in your drink as possible.
I went to a comedy show a couple years ago and they had a two drink minimum (and IDK why I couldn't just get a Dr. Pepper) and my white Russians were like half vodka, half khalua and just enough cream to color it. I was fucked after the first one and I had to get 2!
The problem isn't the amount of liquid, that's standard. Unless this bar invested in a special ice maker, they're likely buying these at 4 dollars each block, that's a huge premium on top of the liquid in the glass.
I'm a bartender, the people who complain about ice are the same people who complain about their negroni not having enough liquid in it. Please just listen to your bartender they absolutely know more than you.