Sorso is a fun new wine bar concept. While you can sit at the bar and chose from a limited wine by the glass list you can also get a tasting card and try the wines on the tasting wall. As others have mentioned, you use a card and select wines by the taste, half glass or full glass.
The upside is it's fun to try new wines on the wall in smaller quantities than a full glass. The downside is you have to get up every time to get a new selection and the descriptions of the wine on the wall are limited.
I did also try the bruschetta when I was at Sorso and the pancetta one was excellent.