Welcome to the Upper Onyx, an exclusive space upstairs at Onyx Uxbridge, offering seating for up to 43 guests and standing room for 55, making it the perfect venue for corporate events, birthday parties, and more. With its stylish decor and cozy ambiance, the Upper Onyx provides an intimate setting for gatherings of all kinds. Our attentive staff is dedicated to ensuring that every detail of your event is taken care of, from personalized menu selections featuring our signature Mediterranean dishes, sushi and more, to impeccable service throughout the evening. Whether you’re hosting a professional networking event or celebrating a milestone with friends and family, the Upper Onyx is designed to exceed your expectations and create unforgettable memories. Book your next event with us and experience the charm and sophistication of Onyx’s exclusive Upper Onyx space.