Mayport is a huge navy settlement, and most nights the outside bar, which is lovely and has great views, is full of navy officers and enlisted men enjoying their evenings. you'll also find UNF students an other beachies, but not the beach crowd you'll find at the lemon bar or ragtime. they do have good drink specials, huge pitchers of long island iced tea for something like 6$. The outside bar area serves some food, but as with most bar seating, the service is limited and slow.
you'll be amazed by the contrast when you step inside. the inside is hard wood, soft lighting, and almost beach elegant. I actually had my rehearsal dinner here. the service inside is great, and the food delicious. for large parties (like my rehearsal) they do have a set menu with very reasonable prices. unfortunately, they do not do any drink specials indoors, or make any arrangements for large parties, but the deal you get on food is so good it made paying for the drinks okay.