Be aware of allergens in cocktail ingredients and ask guests if they have any food allergies. While it may be obvious that a creamy Brandy Alexander contains...
Please also add chitonous insects and arachnids to your crustacean section. My recipe for the Corpse Reviver #2 is topped with toasted cricket bitters, for instance, from a company called Critter Bitters. I also occasionally work with scorpion-infused bitters and mezcal.
Thanks for bringing to my attention. I'll add, "Also, beware of shellfish-derived chitin/chitosan and that people with a crustacean allergy may also be allergic to arachnids (bugs and insects)."