FRIDAY: >> Octogenarian fiddler Joe Thompson (at right), said to be the last black traditional string band player, plays a free show at The Kennedy Center’s The Millennium Stage with fellow folk musicians Wayne Martin on fiddle and Bob Carlin, a clawhammer style banjoist. 6 p.m. >> Space rockers The Gulf sold out their D.C. show in April, and are coming back to play at the Red and the Black with the Joonies, Twin Earth,…

In just a few months, fans will finally get a glimpse of the new $611 million baseball stadium rising in Southeast. No longer will they simply be looking at an artists rendering — they’ll get to see the new concourse, the stands, the suites and the field for themselves. And today the Post’s Marc Fisher poses an interesting question — beyond the bricks and mortar, what should the team’s owners offer inside the stadium? After…