This list includes one on The World's 50 Best Bars and one with Pinnacle Guide pins.
Harry's Bar opened on 13 May 1931, when Giuseppe Cipriani Senior took a room at the end of Calle Vallaresso a few steps from Piazza San Marco, and it became, in the family's words, the place where writers, painters, artists, aristocrats, kings and queens would meet: Barbara Hutton, Katharine Hepburn, Orson Welles, Peggy Guggenheim, Truman Capote and Ernest Hemingway among them. Cipriani's own heritage pages trace the Bellini and the carpaccio to this room. Open every day from eleven in the morning to eleven at night.

Bar Longhi is the Gritti Palace's bar, which the hotel calls its historical and charming social hub, serving what it describes as some of the best cocktails in Venice alongside a Venetian cicchetti menu meant for sharing and late-night snacking. The room and its Riva Lounge on the Grand Canal run every day from eleven in the morning to one at night, from April until October.
Palladio Bar is the bar of Airelles Palladio on the Giudecca, and the hotel frames it as a continuation of the Venetian aperitivo, a room where the day runs from morning cappuccinos to sunset cocktails. The decor borrows from the city's historic bars, time-worn wood and Murano glass chandeliers, with white-jacketed bartenders at a marble counter and views over the Fondamenta. Negroni, Americano and Spritz lead the list, reinterpreted alongside signature drinks, with a tapas menu by abc kitchens and pastry by Cedric Grolet. Open every day from nine in the morning to midnight.
These are the cocktail bars specifically. The full Venice guide ranks the best bars of every style, and the directory lists all 10 with a map and filters.