A Sip of Summer with the Dirty Guv'nahs, one of the area's best-known bands, will serve as a farewell concert and benefit for East Tennessee Children's Hospital. Gates open at 5 p.m. with bluegrass-folk band Subtle Clutch opening the show at 6:30 p.m., and the Dirty Guv'nahs taking the stage at 8:30. A $75 VIP ticket includes a meet-and-greet with the Dirty Guv'nahs; cocktail hour and appetizers; and 20 percent off A Sip of Summer merchandise.