"Salon" has different meanings. The first picture showed a recpetion room, the second picture you posted is about some art event, basically it's a exhibition.

Check our user info page and you'll understand that what I meant by Salon was different.

http://community.livejournal.com/salon_virtuel/profile

"Le déjeuner sur l'herbe" is very nice as an icon indeed, but I am not sure it's tied in with the idea of a Salon. It would be great for the discussions about painting though.