Much like tending to a cat's overgrown claws, bartending requires grace, quick reflexes, and a generous pour of whiskey. Hone your drink-slinging skills with today's Groupon: for $160, you get enrollment in the master bartending course at DrinkMaster Bartending School, valid at locations in Boston, Worcester, and Framingham (up to a $445 value).

The trained instructors at DrinkMaster teach students to rim glasses, mix cosmos, and slide perfectly frothed lagers across the bar in order to attain a nationally recognized bartending certification. The bartending syllabus includes coursework on how to use specific glassware and the art of layering drinks. The in-house bar boasts vast liquor reserves, and the mixing masters demonstrate how to shake martinis like recovered germophobes shake their fear of doorknobs. Teachers also advise students on building their resumes and coach them through interview techniques to use during job placement. At the end of the course, students receive bartending certification and a graduation cap made entirely from cherry stems. DrinkMaster students can arrive at cocktail competence in one four-hour-per-day week, or over the course of two five-hour-per-day weekends.

Though DrinkMaster Bartending School sometimes features a discounted price online, this Groupon still offers the best deal available.