Too many ingredients on the back bar
Are there more infusions and syrups listed on the menu than there are spirits? This means that the so-called "craftsman" behind the pine is just trying to mask the flavor of booze to get you to imbibe more, and do it more quickly. A true bartender can do the same without the crutch of overly sugary or fruit-laden drinks. Spirits are elegant and nuanced and shouldn't be hidden away behind a candy coating. Sure, sugar and fruit are also integral parts of many classic cocktails, but know when to spot the pretender, and you'll be well on your way to better drinking.
Too many ingredients in the drinks themselves
Next, take a second and count how many ingredients are in each drink. Do any have less than five? If not, the place falls into the same column I already mentioned. The "mixologist" is too eager and lacks focus. Blending too many ingredients into one glass is a clear and shining sign that the drinks here are fake.
While perusing the bill of fare, do you notice any of those little trademark symbols next to the brand-name spirits in the cocktail? If so, they likely paid to be featured. This practice usually leads to poor decision-making by the bar staff, who try and force a round peg into a square hole, concocting all manner of ill-formulated drinks and unleashing them on an unsuspecting patron. No thank you.