For the country blues and boogie fans, Friday night at the Allen Theatre in downtown Cleveland was the place to be. The Grateful Dead played for a packed house until close to 2 a.m., making it one of the liveliest concerts ever to come to the Cleveland area. The sold-out concert also was broadcast in its entirety over rock station WNCR-FM, also a first for any major concert. The show began at 7:30 p.m. with the back-up group - The New Ryders of the Purple Sage - an offshoot of the Grateful Dead. The Ryders played fine soothing country music - a smooth soulful sound. The Grateful Dead came out on stage about 10 p.m. starting with their old favorite, "Truckin'." The five-man group, complete with shorter than usual hair, and button-down-collared shirts, started back in Haight-Ashbury in 1965 when they gave free concerts. Led by Jerry Garcia, the group has recently begun a public relations campaign with gimmicks like Grateful Dead Month and "Dead" sweatshirts. The Dead sounds are easy going and natural. On the whole, the concert was a unique one. It had everything - from flames shooting up on the side of the stage, to audience members dancing in the aisles. A very worthwhile show to see. Mastered from the original broadcast tapes. Limited edition 2CD digipak. Band Jerry Garcia - Guitar, Vocals Bob Weir - Guitar, Vocals Phil Lesh - Bass, Vocals Bill Kreutzmann - Drums Keith Godcheaux - Piano, Organ