Tending bar includes a lot of jargon, such as “on the rocks”—a drink fortified with minerals—and “make it a double,” which is a request for the barkeep to clone the cocktail so no one notices the original is missing. Learn the subtleties of the alcoholic arts with today’s Groupon: for $20, you get enrollment in a bartending class from professional bartender Christophe Rougny (a $40 value). Classes take place at Wine World Warehouse on Mondays at 6 p.m. and Saturdays at 2 p.m.

A native of France, Christophe Rougny has slung spirits to thirsty cocktail quaffers in high-end locales from Cannes and Monte Carlo to New York City, plus backstage at events such as Ozzfest. Take a triple shot of scholarship as your mixological headmaster guides you through a 90-minute primer on everything you need to know to turn your home bar or office conference room into a potable paradise. Lessons include classic cocktail recipes and ratios, bartending techniques, and puzzling brain-teasers to frighten away slow-witted pink elephants. The lion’s share of the class is spent with the students mixing, pouring, and sampling their own drinks, helping them develop cocktail-shaker muscle memory that can also be invaluable when shaking dice and Magic 8 Balls. Classes consist of approximately 12 people, and include all the alcohol you need to invent your own signature drink.

Participants must be 21 or older.