To throw the best birthday party in a rooftop bar, choose a venue with stunning views, ample space, and a lively atmosphere that matches your celebration style. Reserve your date and time well in advance, as these spots can be in high demand, especially during peak seasons like spring and summer. Work with the bar to design a menu featuring your favorite cocktails, appetizers, and main courses, and consider options for guests with dietary restrictions. Boost the rooftop vibe with themed decorations, such as banners, lights, and table settings that add a personal touch to the party. Plan for music, whether it’s a live band, DJ, or a curated playlist, and check if the bar offers any entertainment services. Finally, provide your guests with detailed information on the venue’s location and any specific guidelines or dress codes.