Hidden away on quiet Colborne Street, a stone’s throw from the Cosmopolitan Hotel, P.J. O’Brien is one of the classiest Irish pubs in town. White-jacketed bartenders keep ruddy-faced regulars topped up with premium tap lagers and ales (including Guinness and Kilkenny), while the efficient wait staff serves reasonably priced Irish fare to a business crowd. Melt-in-your-mouth corned beef and cabbage is the biggest hit; old-fashioned Irish stew is classic comfort food. Servers are polite; white tablecloths add a touch of elegance. Traditional Irish music on Friday and Saturday nights adds to the old-world charm. After 5 p.m., this pub is hopping—so leave work early or be prepared to stand.