Everyday until Saturday, Nov. 1 from 8:30am-7pm, except Sundays, registered voters can cast their ballots at nine early voting centers throughout the city, including one in Columbia Heights. That way you can avoid any line and get it done early.
If you aren't registered in DC or need to change your address, you can also register as you vote, either at an early voting center or on election day at your regular polling place. You must also provide valid proof of residence: a current government photo ID, government check or payment or other government document with your current name and address.
Here's how you can find where your polling place is.
Here are the voting centers, and more from the city on early voting. You can vote at any of them, no matter your ward.