Saturday nights at Apartment 503 playing the best in Hip Hop, RnB, Reggaeton, and Top 40! . APARTMENT PARTY VIBES Hidden in a non-descript building in the heart of Koreatown...located on the ROOF TOP of a low-key modest building...is an apartment...where every weekend...the creative, fun-seeking and music-loving people come together to make the Best House Party Vibe in LA. Party the night away in the at our rooftop apartment enjoying drinks, pizza, dancing and creating unforgettable memories with your close friends and roomies of APT 503.