I've always been a fan of Sunnyside - the bathing pavilion was built in 1932 and is one of my fav buildings in the city.
Yesterday I kicked back with some friends on the patio, had some interesting new beers (Keiths white for one), stellar service and some decent apps. On a muggy Toronto day, sitting down having beers at Sunnyside definitely hit the spot.
There's also now a swimming area just off the beach/patio, cordoned off and filtered for freshness I'm told.