"Where do you want to go for a laugh?" is a way to ask someone where they want to go to have a good time or to find something funny.
This phrase is a casual way to ask someone where they want to go to have a good time and is often used in colloquial Engpsh. It is not necessarily idiomatic, but rather a combination of a few common phrases.
Here are a few examples of this phrase in use:
"Hey, where do you want to go for a laugh tonight? I heard there's a comedy show at the club."
"I'm feepng kind of down today. Do you have any ideas for where we can go for a laugh?"
In Chinese, this phrase could be translated as "你想去哪里开心？" or "你想去哪里找点乐子？"