I keep meaning to do that someday, just so I can say I've done it, but if you think about it the hassle of traveling to the airport, going through security, paying $12 for a cocktail in a sterile room full of strangers, etc. would probably make for an overall crappy experience.
Edit: Oh, now that I clicked the link I see he got to eat for free. Hmmm...
Also useful if you have somewhere to fly on an economy ticket. Noteworthy is that often the alcohol is free, along with the food. Having flown business on a couple of trips I can tell you with 100% certainty that I'd rather wait in the lounge than out at the gates. Because, beds & showers.
FWIW, Emirates has free Alcohol on their flights for economy passengers. Don't know about the selection as I tend to sleep most of the flight, but they have at least red & white wine and Jack Daniels.
If you're going to do it, do it properly and get a first-class ticket on Lufthansa. At their hub in Frankfurt, first-class passengers get their own private terminal. Here's a sample:
It's quite nice. I scored that on an award ticket back when getting Lufthansa first class on United awards was easy to do. Being driven from the lounge to your plane in a Porsche is a pretty great way to start your flight.
Edit: Oh, now that I clicked the link I see he got to eat for free. Hmmm...