The Alembic, in the Upper Haight, takes the craft of mixing cocktails and serving food quite seriously, the kind of place where you know each drop and each morsel has been painstakingly prepared. Now it should be noted that an $11 Old Fashioned chasing a plate of bone barrow is not for everyone, but for the connoisseur who doesn’t mind paying to play, The Alembic is your Mecca. Foodwise, the crispy pork belly is legendary, but come with a group so you can also sample the fried oyster po’ boy sliders and the pickled beet and apple salad.