Not that I drink much but sometimes with Mexican food I order a margarita. At times I swear they either add a few drops of Tequila or exclude it completely. More home cooked meals for the future and I hate getting ripped off these days paying more for less. Govt and corporate greed shucks under Oblahmanism.
Should eat at our local Mexican Joint. We’re regulars and tip well.
When we order a pitcher of beer they bring it full and all the mugs 1/2 full.
Margaritas? Top self with an extra 1/2 shot at regular price.
There is a lot of truth in that. Restaurants are very sensitive to litigation and do not want to be responsible for intoxicated customers getting DUIs or worse, causing a fatality. So they will be careful when pouring a second or third drink for a customer. In many dining establishments, the waitstaff are trained to let the bartender know if it is a customer's second drink so that less alcohol can be poured into it.
Unless I'm sitting at the bar and can see my drink being poured, I stick with the "house brand" of liquor. You are definitely overpaying ordering top-shelf liquor in a restaurant. I'm a bit of a snob when it comes to liquor but I generally only drink the top-shelf stuff at home. And yes, there is a difference between say Herradura tequila and Jose Cuervo. Or Glenlivit scotch vs Dewars. Etc.