Sonsie is the place to see people and be seen when the weather is nice outside. The front windows, which open onto Newbury Street, offer prime viewing of the "runway" where fashionistas strut on their shopping adventures. To get a window seat, you might sometimes have to be famous (depending on the demand and the time of day) and the hostess might act like you've overstepped the social caste system if you ask for one at the wrong time.
Some truly famous people have reportedly visited Sonsie during the prime time business hours, though I have yet to see any celebrities there for myself. Of the Boston elite, Matt Damon and Steven Tyler have been rumored to stop by during home stays.
As you might expect with the hotter-than-thou attitude, Sonsie is a truly swanky bar and restaurant. The richly decorated interior is the perfect place for after-work drinks or to meet some pals for brunch on Sunday mornings. Even if you don't get a coveted window seat, the other seats in the restaurant are well appointed and catered to.
Though sometimes the hostess can be a bit snooty, the friendly bartenders here more than make up for any attitude you encounter at the door. They are very knowledgeable about their craft, too; there isn't a drink that you can order that doesn't come perfectly prepared.
The menu at Sonsie has an unexpected broad range of American fare. Dishes range from the fairly inexpensive (pizza for about $10) to the pricey (steak for about $50), but there is truly something for everyone on the menu. All dishes, regardless of price, are well prepared and artfully presented by the servers. Brunch here is extremely popular due to the versatile menu and alfresco atmosphere. Come early or expect to wait!
Sonsie is a bit overrated due to the scenesters that frequent this joint, but it is worth the trip for a good meal and excellent service. To get the experience but avoid the crowds, go on weeknights in the beginning of the week.