Please understand that Pinta Cana is WAY out in the East, and there is nothing there except the hotels and their resources.
In Santo Domingo you have the vibrant night life and the hustle and bustle of a major capital city.
AND, if it free, you can better spend your money having fun, since you can bet that your family won't let you pay for food unless you offer and insist.
They are two different worlds, so you had better decide what you want: Peace and quite in a tourist environment or the YEAH BABY, in your face of the abig city.
Hb