Kourtney Kardashian And Khloe Kardashian Together At The Warwick Nightclub 2860 Kourtney Kardashian and Khloé Kardashian attended Diana Ross’s 75th birthday party at the Warwick Nightclub in Hollywood. See more photos of the event in the slideshow. PREV1 of 15NEXT Submit Rating Average rating / 5. Vote count: No votes so far! Be the first to rate this post.