I have a piece of advice for anyone who dares try one of the old-fashioned cocktails at Circa 33 (3348 SE Belmont St., circa33bar.com), the latest gem to open on Belmont Street: Don't be afraid of the egg whites! You see, this "haunt" is a Prohibition bar (the name pays homage to the year Prohibition was repealed) that's not afraid to mix things up, with two separate lists featuring libations from the 1900s and new twists on a few classic spirits. And, despite my initial trepidation, the best things I tried featured frothed egg whites, including a Pisco sour (brandy, Angostura bitters, lime juice, sugar and egg white = cocktail heaven) and a Boston sour with housemade bourbon. With 12 beers on tap, over 100 whiskeys and a brunch menu that debuts this week, this is one new bar that won't get old anytime soon.