Blue line terminal is at 1st & Broadway. Within 1-3 blocks are Kings Fish House, L'Opera (classic italian-very posh), Madison, and 555 East (both very upscale american), La Traviata (cozy, classic europeian). If you choose to walk, or take the Passport shuttle, about 5-6 blocks down to beach (convention center, aquarium, boat tours), there is a "hub" of good restaurants - P F Changs, Gladstones, CPK, Parkers Lighthouse, etc.
The Passport is a shuttle around downtown and Queen Mary, most of which is free - get info at Long Beach Transit. Also lots of info Googleing Long Beach - C of C.
101 Pine Ave., Long Beach, CA 90802
1126 Queens Highway, Long Beach, CA 90802
301 Cedar Ave, Long Beach, CA 90802
Kings Fish House
24001 Avenida De La Carlota Ste B, Laguna Hills, CA 92653
555 Ocean Blvd., Long Beach, CA 90802