For authentic Guinness and Irish music, you can't beat the Dubliner. It's just across from Union Station. With a spacious interior and an open-air patio in the warm months, this place is popular with all age groups. Open Sunday 7:30 am-2 am, Monday-Thursday 7 am-2 am, Friday 7 am-3 am, Saturday 7:30 am-3 am. 520 N. Capitol St. (Metro: Union Station), Washington, D.C. Phone 202-737-3773. http://www.dublinerdc.com.
