Not since 1987 has Cuba’s crossover queen made an album so unrelenting in its fusion of disco with salsa. Despite its laudable lack of ballads, Gloria! never quite matches the Copacabana catchiness of Miami Sound Machine’s bubbliest old hits. But tracks like ”Lucky Girl” and the ominously undulating ”Cuba Libre” reach for the skies like a missile-crisis fiesta thrown by Donna Summer. B