Begin rant.
I can't tell you how frustrating it is to live in a place where even the managers and staff of Mexican restaurants don't know the first thing about tequila. Every time I eat at one I end up having to explain to them the difference between a puro and a mixto and tell them which brands are which. We've stopped frequenting one such place because I got tired of explaining to the same manager, every time I was there, that Cuervo Especial in not a puro and that 1800 is.
So last night we went to a different place that used to have a nice menu of margarita options, including a couple made with either a low-end (1800) or high-end (Don Julio) tequila. They've since reduced the margarita menu to three options. The first, appropriately, is a "Tradicional" made with the house tequila. (Pass.) The second, which they call "Top-Shelf," is made with Cuervo Especial. (This is "top shelf"? That's just an outright lie.) But here's the real kicker: The third option, the name of which I don't recall, is listed as being the same as the "Tradicional" but with an added shot of 1800. This didn't make any sense to me so I queried my server, who confirmed that this is exactly what it is: It's made with a shot of the house tequila, plus a shot of 1800.
This might just be the single stupidest idea I've ever heard. If you don't know or care about tequila and just want an extra-strong drink, why would you care that the extra shot was 1800? And if you do know and care about tequila and therefore prefer 1800, why would you want your drink to also include a shot of the cheap house brand? What if you want the 1800, but just at "regular strength"? I tried to explain this to the server -- who has worked there forever (I think she's the wife or daughter of the owner/manager) -- but it was like talking to a wall. Of course, they eventually were willing to make me a "custom" margarita with just a shot of 1800, but it was like squeezing blood from a rock.
End rant.