Though not my tipple of choice, it's a wise move.... The Liver will be so busy processing the Alcohol that Glucose will not get a look in🙂..... Of course, if this lasts 2 hours or more then you will have achieved your goal of no more than 2-3 mmol BG rise 2 hours after eating (the rest doesn't count anyway.... Or you will be too "relaxed" to care).
Wash your mouth out with Salt & Vinegar.... It was hearbreaking (when we were in NZ last year) to always be served frozen chips with a vat of mayo.... I asked for malt vinegar once & all they could find was white wine vinegar