Pieced this food list together on Google over the years from various recommendations.
Gaspard de la Nuit
L’As du Fallafel
Le Grand Bain
Le Petit Commines
Good people watching and general fancy… everything can be found in the Marais area. If the weather’s good then being out on the terrace with a glass of wine (or if not drinking a glass of grenadine on ice, or just a good coffee) watching the city move is kind of the quintessential good life there.
And if you ARE there, go here
54 rue des Archives
Paris 4e arrondissement
and get yourself a couple of chouquettes. Life changing patisserie.
There is of course more than one standout gallery/art related place in Paris, but for me it’s l’orangerie that is the most breathtaking. Monet up close, surrounding you, in a building literally designed for their vast hangings.
If you want to blow the budget, Aspic is a phenomenal restaurant and if you like Japanese food there’s ‘To’ restaurant, which is one of the best meals i’ve ever had. Both, I believe, can cater for vegetarians (check though) and both (much like @ConcertoRoberto alluded to above) will need prebooking like a motherfucker.
you won’t regret it.
For cocktails with a distinctly silly vibe, the shell bar in Grands Boulevards hotel is dynamite, including non alcoholic.
if you’re tempted to see cabaret, avoid Moulin Rouge like your life depended on it - Crazy Horse is vastly better.
depending on how niche your tastes, i also have thoughts about bookshops, boardgame shops and walking routes.