Set along the Peconic River, the Sea Star Ballroom at Atlantis Banquets & Events offers a rare kind of East End elegance where a true ballroom experience meets the ease and beauty of the waterfront. As one of the only formal ballrooms on Long Island’s East End, it brings a sense of occasion that feels both elevated and unexpected for the region.

Inside, the space is defined by sweeping windows that frame the marina and river beyond, allowing natural light and water views to become part of the celebration. The atmosphere shifts effortlessly from day to night, creating a setting that feels equally suited for intimate gatherings and grand, full-scale weddings.

Ceremonies unfold with intention, whether outdoors at the Riverside Pavilion with the water as your backdrop, or within the grand foyer beneath a statement chandelier that sets the tone from the very first moment. Each transition throughout the day feels seamless, curated, and distinctly refined.

At its core, the Sea Star Ballroom is designed to host with both style and flexibility, welcoming celebrations from 30 to 350 guests without ever losing its sense of intimacy. The experience is further elevated by a culinary program led by an award-winning executive chef, where menus are thoughtfully tailored and rooted in elevated, seasonal cuisine.

For couples seeking a true ballroom on the East End, one that pairs polished design with waterfront ease, the Sea Star Ballroom offers a setting that feels both timeless and transportive.