It was a birthday twin-bill for Mike Gordon. Early in the morning of June 3 (his 43rd birthday) he sat in with Dark Star Orchestra at Burlington, VT’s Higher Ground. Then as evening rolled around, he stepped up once more, appearing during the second set for ‘Space’ which drifted into ‘The Other One.’ The show featured an additional guest as well, with Rob Eaton Jr. appearing on guitar alongside his father Rob Eaton (DSO’s Bob Weir) on a version of ‘Easy Wind.’ Dark Star Orchestra is off tonight and then will appear on Thursday at Englewood, NJ’s Bergen Performing Arts Center.