Problems associated with noisy bar patrons are not unique to Manayunk. Here are similar issues in other cities and ideas about how to handle them:

A Toronto neighborhood blog and some of their issues with problem bars

A collaborative model community policing site from Chicago

A solution of Neighborhood Improvement Division from Diamond, CA

From Minneapolis, an interesting take. The smoking ban has contributed to bar problems

Some advice from a lawyer's blog in Toledo, OH about noisy bars

A group called the Urban Conservancy in New Orleans and its stand on neighbor vs. bar

20 Minutes on Main Street

Man Down, Nobody Cares

Bar Crowd In The Street

Very Public Urination

Woman Beaten Unconscious