You could go to Central Park, but before long, you’d be drinking lukewarm spiked seltzer while letting your dog drink from the one bottle of water you remembered to bring. Or you could go to Barking Dog two blocks from the park on the UES. They serve brunch every day from 8am-4pm, Happy Hour beers and margaritas from 3-7pm, and they even have a tiled, in-ground watering hole for dogs.