There's a lot of odd time signatures in West Side Story. The Tonight Quintet is in 4/4, 2/4 time where each measure alternates...4 beats, 2 beats, 4 beats, 2 beats...
The end of "Jet Song" goes from 4 measures of 6/8 to 4 measures of 2/4, and the 2/4 is a continuation of the 6/8 melody ending.
Taunting Scene has a couple of 9/8 measures
A Boy Like That constantly changes time signatures from measure to measure
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli