One meal in Paris (August)

[Pandaproofs]

Hi all,

I'm staying with a friend in Paris, and want to take her to a meal (probably dinner) as a thank you. I'm budgeting about 100 Euros/pp, but it would have to be someplace I can get by with jeans and a shirt. We're in 4eme, but anywhere is fine. Looking for good value, and a good time. Any recommendations would be greatly appreciated.