I first went there with someone who wanted me to buy shares in a company. I wasn't really interested, but I did buy in eventually, because they were very charismatic. Their choice of restaurant sold it to me.
Le Manoir does a discovery (decouverte) menu of 10 courses, where you try lots of bits and pieces and different wines. I'm not a big lunch eater, but it's nice to get a good taste experience. And if you want to sell something, the meeting has to be interesting. I'll only buy something if there's charisma and character there.
The menu includes everything from quail eggs to freshly made Bellinis and salmon mousse, and they send delicious light things like foie gras and toast between courses. Each course gives you something fresh to talk about.