Peacock Alley

noun2

1. •
   Any of a number of specific named hotel foyers, first and most notably that of the Waldorf–Astoria in New York City.
2. •
   (US, historical) Any hotel foyer or similar area where upper-class women congregate in order to be seen.

   • There was a lot of fool humbuggery about these plutocratic hang-outs, with their "peacock alleys" where women strutted to show their clothes, — 1907