On a popular road in Trastevere, Mr.Brown's could be classified as a pub, but it's got too much ambiance for that. A fun, young crowd comes here during the evenings for a quiet drink and air-conditioned coolness in the summer.
The drinks are cheap for Rome and the wooden tables accomodate all number of groups. The brick-a-brack on the walls- including a WWI gas mask- provide good conversation boosters if the conversation runs a little dry.
Best of all they are masters of the cocktail. Lots of different kinds to choose from and all prepared very tastily with no scrimping on the alcohol.
All in all I'd say this is one of the cheapest bars in Trastevere, and great for a group.