The show was fun with a pleasant, but unmemorable score -- in fact, the book was quite enjoyable (loosely inspired by lyricist Sager's own relationship with Hamlisch) better than the songs, although there was one standout number, the showstopping title song with Klein and his co-star Lucy Arnaz. I went to find it, and came upon this clever bit of editing.
The person posting it took the performance by Klein and Arnaz at the 1979 Tony Awards...and edited together with them re-creating the number in 2010. It's a bit odd -- okay, "a bit" is a huge understatement, it's very odd -- but what's most odd is that it actually works. And is sort of a treat. And what's impressive is how good (and similar) Klein and Arnaz are...31 years later.