Drink This: Organic wine, mixed drinks with sparkling water
Not That: Beer, mixed drinks with fruit juice or sugary soda
Shockingly, it isn't super hard to drink when you're doing keto as long as you make sure to stay under your allotted daily carb intake. Wine is a great bet, assuming it's organic and not overly processed with additives and artificial ingredients. Trust me when I say the sugar hangover from drinking non-organic wine on keto is worse than any booze-induced hangover you've ever had.
Otherwise, spirits (gin, rum, vodka, whiskey, etc.) all have 0g of carbs when consumed straight, so mixing them with unsweetened sparkling water or a diet soda is fair game. You can even have spiked seltzer, just watch the carb count because brands like White Claw have a lot more carbs and sugar than others, like Bon & Viv or Henry's. Above all, just stay away from sugary cocktails or carb-filled beer and you're golden.