This is pretty much exactly what the Chat feature was originally intended for. :P
http://japaneseclass.jp/chat
But a forum thread may still work out better for what you want to do, especially since Chat is kinda deserted... I tried to start something similar before in Chat by asking really basic questions in Japanese, so that anyone could answer for practice at writing their own sentences in Japanese. Things like:
・お名前は何ですか?
・ご趣味は何ですか?
・...
A few people responded and it worked fairly well. Once the first person writes their sentence, other people know what kind of thing to write and can answer with their own name, hobbies, etc. You can just answer it yourself first to get the ball rolling. ^^
May 17, 2015 at 11:40pm