I find as many pints as I want at the pub/bar in the airport followed by 50mils of vallium as soon as I board means I wake up smiling in Delhi for a lot less money.
But in the late '90s, I flew Aeroflot business and first a couple of times. Found I could get the first class ticket in Delhi for £550 while buying an Emirites ticket from London was £600, so I could justify it.
Neither Delhi nor Moscow lounges gave free drinks back then. But in 1st, you did get as much Veuve Clic as you could drink. Did 1 bottle on the Del-Mos leg and 3 bottles on Mos-Lon.
Bon voyage.