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oops... My bug, I agree. But you have to forgive me, because I've never heard the singular form in everyday life.[/quote]
No problem. There was nothing to forgive. :D

There is.
It's in a dictionary:
"Толково-словообразовательный
РАЗГОВОРЧИК м. разг.
1. Уменьш. к сущ.: разговор.
2. Ласк. к сущ.: разговор."

You can say "Ну и разговорчик завели,...

The word Разговорчики is usually used when empty, with not much meaning talks are taking place. It carries somewhat negative connotation.