There’s no silverware at Longfellow, a sleek cocktail bar above Alden & Harlow in Harvard Square. But that’s not because there’s no food, it’s because everything is designed to be eaten with your hands. That’s a tough break for germaphobes, but as long as you’ve got some Purell handy, you’re going to enjoy a lot of things that the term “bar food” doesn’t really do justice for. The deviled eggs are topped with ikura, potato chips, and chives. The pigs in a blanket get black truffle and honey. And the waffle fries come with salsa verde. The cocktails are pretty good, too. There’s even a selection of low-alcohol drinks, so if your goal is to make your way through the entire menu, you at least have a small chance of being able to do it before passing out.