It’s a mid-summer midcentury extravaganza as a parade of musical acts from the last half of the 20th century take the stage this month. Singers of the 1960s, ’70s, and ’80s (and even a 100-year-old survivor from the big band era) will splash on the perfume and pomade to entertain you. From smooth crooner Jack “Love Boat” Jones to in-your-face David Lee Roth, now is the time to check in with the classic acts. If KRTH can play Pat Boone and Guns N’ Roses in the same shift, there must be a call for this lineup. See you in the front row.