Egg whites in Cocktails, Part 3: "Aquafaba" - the brine in chickpea cans - apparently is a great substitution for egg whites in cooking and in making cocktails! The advantages of Aquafaba over egg whites:
Cheap and plentiful
Reduced risk of Salmonella
Guests may be more accepting
There was recently a great article on Tales of the Cocktail's web site about substituting Aquafaba for egg whites.
Dushan Zaric, co-author of the Speakeasy book, recently gave a great seminar at the Tampa USBG's Repeal Day Conference called "Health, Wellness & Other Things - How to Work a Shift & Not Get Upset". You can find Dushan's PowerPoint presentation for this seminar, as well as all his other presentations here.