Doris,
Not sure if you have Starwood points but each time we've stayed in Venice we've redeemed points and stayed at the Westin Europa & Regina or Hotel Danieli. They are both WONDERFUL and such good locations! We've never paid for rooms and I imagine they're very expensive (everything in Venice is) so it's a great place to redeem points. You can read about them (and more)here:
Venice Starwood Properties
