Then you add "oh! and please, correct my mistakes."
Bad idea. Why ? Because this might destroy any self confidence you have in French. Specially if you are a beginner or intermediate.
Learning a language is tough. It takes time. You cannot be perfect right away. And it's likely that you'll make mistakes. Many mistakes. If the basic ones should be corrected, it's a rare skill to know which mistake is bad, and which one can fly. And most people are very bad at making this distinction.
Furthermore, your acquaintances are your friends. You want to relax with them, not be in "classroom mode". It might put you both in an uncomfortable place: you being constantly reminded of your mistakes, and feeling stupid, and them being embarrassed because they can't explain why it is a mistake... Because, unless they are teachers, they won't be able to explain most of the mistakes you make. And this is frustrating for both parties.
Believe me, if you want to practice your French with friends, OK, but they don't need the hassle of correcting you, nor do you need the constant embarrassment.
And if you want someone to correct you in a constructive way, then take phone lessons with me :-)
