Beech St. Long Beach LI, NY
Grew up in LB, but eat mostly near my home in Merrick - not too far away if you have a car.
My most obvious recommendation is Gino's. It's directly across from the LB train station. Grew up on their pizza - still go when I have the chance.
My favorite is Rachel's in Freeport on Woodcleft canal - you do need a reservation. They have some outdoor seating and overlook the canal. I also like Otto's - more low key, and EB Elliots's - higher-end and better food. I think both have outdoor seating and bars.
Jordan's in Island Park is closer to LB. They mostly do takeout but have a sit-down area. Have been eating their lobsters since I'm a teenager.