Rodadero
Works if you want movement and many options.
There is no single perfect dinner area in Santa Marta. Rodadero works if you want walkable variety and later opening hours. Bello Horizonte and Pozos Colorados fit calmer hotel-or-beach dinners. The old town works for a more urban night with walkable atmosphere.

For dinner, area choice matters as much as the dish: beach views vs urban walkability.
Works if you want movement and many options.
Works if you want quiet dinner near your hotel.
Works if you want an urban dinner plus evening walk.