I have a friend headed to DC for the first time for a conference - she is excited to not only see it but experience the food & music evening scene (jazz, blues, salsa, etc). She will be at the Hyatt Regency by the Capitol. Any suggestions for musts accessible by foot, metro or taxi. I grew up in VA but haven't been to DC in over 7 years so relying on this community to steer her right. Thank you!