Over half a million people rode Metro on March 24, the day D.C. hosted March For Our Lives. Now Miriam's Kitchen, a D.C. charity seeking to end chronic homelessness in D.C., is asking visitors who attended the march to mail in their used Metro cards so they can be redistributed to the homeless.

WASHINGTON — More than 500,000 people rode Metro on March 24, the day D.C. hosted the March for Our Lives. It was not a record, but the ridership was about 2 1/2 times greater than a typical Saturday.

Metro tweeted out its final number of 558,735 on Sunday.

Former President Barack Obama’s 2009 inauguration holds the Metro ridership record with 1.1 million trips. The 2017 Women’s March takes second place, with 1,001,613 trips.On the day of President Trump’s inauguration, the system recorded 570,557 trips.

Chances are, many riders from Saturday will have left over money on their SmarTrip cards, and one D.C. charity has come up with a use for them.

Miriam’s Kitchen, an organization seeking to end chronic homelessness in D.C., posted a message on its Facebook page, Thursday, calling on visitors to mail in their cards so they can be redistributed to the homeless.

Those who want to help can send their cards to the following address:

Miriam’s Kitchen

Attn: Brenda Segal

2401 Virginia Ave. NW

Washington, DC 20037

If you send in a card, the charity suggests putting a Post-it note on it indicating the fare balance.

This is not the first time Miriam’s Kitchen has asked for used Metro cards.

The organization, and another local charity, also collected fare cards after the inauguration of President Donald Trump and the Women’s March on Washington in January 2017.