Not to dissuade you, but restaurants are some of the most flimsy businesses to open. If you can't turn a profit in 6 months then it's curtains.
A bar/club can work but you have to capitalize on the "newness" factor. Let me explain.
My uncle owns some clubs/lounges/restaurants in Nigeria. He'll open a new club e.g. Lux at location A. Lux will be like the hottest club in town until he opens up Viper at location B. All the people from Lux will migrate to Viper for a while until he launches a "new" club e.g. Truth at Location A. Rinse and repeat. Same management, same locations, but different branding that capitalizes on the "newness factor".
You could do the same thing with a restaurant where you start a holding group which rotates different offerings at a specific location. From Jan - Jun it could be Afro-carribean fusion, then Jul - Dec it could be Afro-latin fusion etc. With restaurants the big thing is good food and newness, especially in a city like NYC where you're spoiled for option.
I will say this, however, if you can identify a niche that hasn't been well served, you could eat well.
Buka home
That's a spot in NYC that I'll have to try next time I get to BK. A lot of Nigerian restaurants I've been to are just to "local" and haven't really invested in the atmosphere aspect of the restaurant.