Le Rostand is located nearby the Luxembourg garden, on the edge of it. An institution of this neighborhood.
nearby the Jardins du Luxembourg, center Paris
Outside : a nice and large terrace in front. In winter, you can enjoy an open fire place. 
Inside : It has a classy interior and a long mahogany bar. Some people could say that it’s a “well-behaved” place, but so charming and intimate. Classic and elegant.
nearby the Jardins du Luxembourg, center Paris
My advice :
- A nice, classic and convenient spot right to the Luxembourg garden. Le Rostand is also on the edge of the Latin quarter.
- Le Rostand is most of the time busy, especially during the sunny days. But still a nice place. For less people, better choose to go to the Rostand in the morning (or other seasons than Summer). But you may enjoy it to when it’s busy, for the atmosphere.
- Le Rostand : for a drink but also for a light meal.
- You may enjoy having a look at “Dalloyau”, (just nearby the Rostand, Place Edmond Rostand too), which is one of the best French Patissier/traiteur = Pastry shop and catering shop) (Several Dalloyau shops in France). They have a tearoom, but no terrace. You probably won’t be disappointed by their products ! They are fabulous. High range quality.
Le Rostand : 6 place Edmond Rostand – Paris 6 – 8am to 11 pm