Pizza Sano is a tiny little pizza joint in Moto Azabu, just up the street from Moto Azabu Hills. It's built like a bar with a counter, but there is also a table where you can sit outside. It's reasonably priced and the pizzas are pretty nice too. You can also try their ginger beer, which is basically a beer with ginger syrup!
If you live locally, I'm sure you would enjoy a casual evening there.
The "Miyabi" Chicken, teriyaki, garlic and mayo