The restaurant on the river recently marked its 25th anniversary and continues to be one of the most appealing spots in town. The casually elegant, many-windowed space with contemporary artwork displayed throughout the rooms offers a list of upscale appetizers, entrees, and desserts from the kitchen of chef Chris Franz. Dishes that typify the Rattlesnake style include seared diver sea scallops, maple-cured duck breast, and an array of prime steaks from an eight-ounce filet to a 24-ounce porterhouse. The service staff includes some of the savviest restaurant veterans in town, including bartender Farouk Elhaje. L & D Tues.-Fri., D Sat.