Harry's Bar was a Hemingway hangout and the home of the Bellini, a drink made with peach juice and white wine. Harry's Bar is just a few steps from the San Marco/Vallaresso vaporetto stop. The bar is touristy, but has a dress code--no shorts. We saw one of the waiters refuse to let two young men who were dressed in shorts into the bar. We enjoyed a very over-priced bellini, just to be able to say we had one at "Harry's".
Upstairs from the traditional bar is a very nice restaurant, with great view of the Grand Canal and San Giorgio.