If music be the food of love, disc jockey Tony Brown must be Cupid’s personal chef. As host of The Quiet Storm, Power 99’s Escoffier of aural affection airs his romantic music five nights a week. His baritone purr and seductive playlist have made him one of the city’s most beloved DJs and the undisputed king of late-night radio. Brown did it again last week. In the winter Arbitron “book” released Thursday, his weekday show on urban-contemporary WUSL-FM (98.8) was again the most popular broadcast in its time period.