Replacing High Steaks on the Marina’s lobby level, DJ’s Steakhouse offers its no-fancy-stuff, older-crowd diners standard meat and potatoes fare that’s just creative enough to stand out. Take, for example, the taters—homey mashed made sweet with caramelized onions. The decor is subdued, with a centerpiece fireplace and pretty blue and green tiling that would make for a good casino oasis if it weren’t for the open walls and Madonna’s “Holiday” blasting from next-door lounge the Wave. But get past the cacophony, and the steaks are superb, especially the 24-ounce porterhouse or any of chef Ron Frederico’s specials. Besides the beef, there’s a raw-bar appetizer, shellfish platter and plenty of other worthy options (crab-stuffed shrimp and classic lobster thermidor). Whatever you do, don’t stuff yourself: The brownie-batter-like chocolate cake is otherworldly. For the full treatment, come Friday through Tuesday for a four-course $65 prix fixe.