From their website:
People from across the United States, Canada, Hong Kong, Australia, The UK, Sweden, the Philippines, Uganda and more gather for a day or an evening of sewing dresses out of pillowcases and fabric. They gather in living rooms, basements, backyards, dining rooms, schools, churches and civic centers.
They join together because they believe that every girl deserves the dignity of owning at least one dress.
How awesome is that?
Check your neighborhood, church or school to see if they participate. If not, start your own sewing party.