By Judy Kurtz - 08/26/13 03:53 PM EDT
The ex-lawmaker, who lost his reelection bid last year to now-Sen. Elizabeth Warren (D-Mass.), is seen beaming in a YouTube video as he strums a guitar during the jam session of the group’s 1978 hit “Surrender” at a New Hampshire casino.
Brown, 53, tweeted after his performance Sunday:
But it was quickly back to business the next day for the former Massachusetts senator, who last week ruled out a gubernatorial run in 2014.
Brown tweeted Monday that he was appearing that morning on the Fox Business Network to talk about the “mess in Syria.”