OCEAN's ROAR??

On a relatively routine weekend at the box office, when no film took in more than $40 million — let alone $140 mil — and grosses were off about 7 percent from a year ago, Ocean's Thirteen rolled the dice and came up No. 1.

The franchise flick grossed $37.1 mil, according to Sunday's estimates, a notch below the fall-season debuts of both 2001's Ocean's Eleven ($38.1 mil) and 2004's Ocean's Twelve ($39.2 mil).

Moving from casino metaphors to the swashbuckling kind, Pirates of the Caribbean: At World's End (No. 2) continued its steady walk off the plank, dropping 52 percent to earn $21.3 mil.

The domestic comedy Knocked Up (No. 3) continued to delight audiences, dropping a mere 35 percent in its second weekend to earn $20 mil.

The CG penguin pic Surf's Up drowned at No. 4 with a waterlogged $18 mil.