For much of the time, a curtain depicting American flags drapes the doorway to the entrance of Mary's Hair and Nails and the store's white blinds are drawn. But don't be fooled: The business is not closed. Located on a second-floor nook in suite 206 of 650 Roosevelt Road, in a building that's a mini-plaza within Pickwick Plaza, Mary's Hair and Nails is open by appointment only. To make an appointment, call 630-942-0347.