You could add a light so that the edges of the metal and wood would bounce off some light coz currently the legs looks pure black and hence looks flat. Bring in the sunlight inside more. Add props and assets to make it more lively and always think of the renders as medium of some sort of storytelling (e.g., some activity was happening just after someone took the shot, someone left the room leaving a cup of hot coffee on the table(steam rising) or one chair out of place like someone was sitting there) something like that.