Couples who applied for marriage licenses on the first day they were available last week can pick them up Tuesday and tie the knot.
Three weddings are planned at the city's Human Rights Campaign office. The advocacy group helps with lesbian, gay, bisexual and transgender issues.
An afternoon wedding is planned at All Souls Church -- the same place where DC Mayor Adrian Fenty signed the bill legalizing the unions.
The District of Columbia is the sixth place in the country permitting same-sex unions. Connecticut, Iowa, Massachusetts, New Hampshire and Vermont also issue same-sex couples licenses.