Countless hours have been spent in the pursuit of the perfect martini. Shaken or stirred, The Ann Arbor Art Center once again presents Artini 2011, an annual Ann Arbor quest to find not the best tasting martini, but the most artful. Some of the city’s finest establishments will step up to the plate on Friday, February 18 for the challenge, and you have the opportunity to be the judge. Space is limited for the crawl and the event is always sold out, so sign up now. $40. 117 W. Liberty St. 734-994-8004. www.annarborartcenter.org.