The easiest answer of all: Pat's. The King of Steaks is, most certainly, king in this competition. You can always Geno's Steaks if you want a letdown, but why would you visit that on yourself? Enjoy a fine meal at Pat's King of Steaks and pat yourself on the shoulder for a choice well made. There really isn't a comparison.
Whether they'll admit it or not, just about every local has spent a few hours at Ivan Kane's Royal Jelly Burlesque, but that's definitely not an appropriate scene for many. If you have the time and the cash, Atlantic City is famous for its casinos, and a stop at Harrah's Resort might be in order. If you really want a feel for the city, though, go adventuring and hit up the local restaurants - avoid anything that looks like a tourist trap or big chain. Take a Sack O' Subs over Cafe 2825 any day.