Serious Pie. There are 3 locations: Virginia, Westlake, and Pike. We went to the Virginia location. They don't take reservations but happily, on a Monday around 6 pm, we were seated after only a 5-10 minute wait. For beverages, I had a glass of chardonnay, SP had iced tea.
It's hard for me to write about pizza because there are so many crusts and so many toppings and it's such a personal taste thing. Serious Pie is a thin crust, fancy (pricey) pizza place. I prefer thin crust pizza like this. It was good and I liked it but I didn't love it. For me, currently the ideal pizza is Mercurio's in Pittsburgh. SP agrees. So while we both liked Serious Pie, we didn't love it, and it was not a cheap meal. We spend less at Mercurio's for 2 pizzas and a starter plus iced teas and gelato. I'm just not sure we'd go back next time we're in Seattle. That being said, service is wonderful and I liked the relaxing, dimly lit interior. It was a nice atmosphere in which to end a day of sight-seeing.