I work at a restaurant where I kind of need a certain dress code to fit in and be hip and cool. Pic related is what I usually wear.
get some nice black tshirts, american apparel, uniqlo, banana republic whatever i dont know your budget
get black skinny jeans, levi's 510 or 511 depending on ur body
get vans old skools in black with white stripe colourway
all black, 'hip' 'cool' fit u should be set