The Old Line Society is a 501(c)(3) tax-exempt philanthropic organization catering to social and civically minded young professionals in the Baltimore area. OLS aims at getting the new generation of young professionals in Baltimore to raise money while raising their glasses for local charities and the arts. In its young history, OLS has raised thousands of dollars for organizations such as Year Up, Center for Urban Families, Family Tree, and Cylburn Arboretum, while providing a fun and altruistic alternative to the routine social calendar.

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