Classic rock meets indie as members of legendary jam band the Grateful Dead and hipster-approved the National are teaming up for a free show. The supergroup itself will be fronted by Grateful Dead guitarist Bob Weir and rounded out by brothers Scott and Bryan Devendorf from the National.

According to Rolling Stone, the Bridge Session will take place on March 24 at Weir's TRI Studios in San Rafael, Calif., with the voter registration organization HeadCount producing the event. A mix of National and Grateful Dead material is expected to be played, as well as a few politically-charged covers. Can you imagine these guys covering a Rise Against song?

Grateful Dead lyricist John Perry Barlow will host a roundtable discussion in between songs with Weir. Topics will include First Amendment rights, the influence of money in politics and more. The panel will be truly interactive as fans can submit questions in real time through Twitter.

Only 40 tickets will be made available for the intimate performance to those who make a donation of $1,000 or more, with profits benefitting the HeadCount. However, the free webcast will be made available for everyone around the world to see at