Poseidonia Beach Club is a seaside hospitality destination on the Cilento coast in Marina di Ascea, Italy. It combines a beach club with dining and leisure experiences, offering visitors a place to relax by the Mediterranean throughout the day. The equipped beach provides modern comforts, a café and bar, breakfast, aperitifs, entertainment, and a mini-club with activities for children. Guests can book beach umbrellas and enjoy meals or drinks on the beachfront.

Dining options include a restaurant serving seafood and local-inspired cuisine on a terrace overlooking the sea, a pizzeria specializing in dough with 48 hours of controlled leavening and ingredients sourced locally, and a sushi offering that blends Japanese techniques with Mediterranean flavors and local catch. The venue also provides takeaway sushi and accepts table reservations. Described by the business as a place focused on relaxation, good food, hospitality, and respect for nature, Poseidonia hosts events and publishes news about its activities and sustainability initiatives. The site also lists boat berths and holiday apartments among its offerings.