Broadway’s spring break is definitely over: Box office in Week 47 (April 16-22) was down almost across the board, with the biggest drops reported at shows most fueled by city visitors. Still, there were some notable victories — including at “Death of a Salesman” and “Gore Vidal’s The Best Man,” two plays that secured spots in the frame’s Top 10.It’s not all that common for one non-musical to stake out a perch in the Top 10, much less two. But almost every single musical on the boards saw sales slow, while both “Salesman” ($892,533) — once again breaking a house record despite seven perfs per week rather than the standard eight — and “Best Man” ($860,132), upticked enough to make the shortlist. The only tuner to rise was “Nice Work If You Can Get It” ($929,949), in a frame that included press perfs. That show, toplined by Matthew Broderick and Kelli O’Hara and incorporating familiar Gershwin tunes, shaped up into a strong B.O. contender even before it opened. The heftiest dips were logged at “Mary Poppins” ($845,512) down 34% (or $430,000), and “How to Succeed in Business Without Really Trying” ($517,934) plummeting 30% despite a ninth perf. The 24 musicals grossed $20,146,049 for 77.7% of the Broadway total, with attendance of 214,280 and an average paid admission of $94.02. The 15 plays grossed $5,765,968 for 22.3% of the Broadway total, with attendance of 85,108 and an average paid admission of $67.75.