WATCHA DOIN?? 

Her: Watcha doin?

Him: nothing much.

 Her: wanna go out and play?

Him: sure. where? 

Her: I know a place ^^ 

What would you like to do when you're going out? 

Here, going out doesn't mean the date, but the actual action of "going out somewhere"

There are many preferences such as 

the park, 

the movie theatre,

 the playground (if you are the appropriate age),

But... would you like to do something else? 

Perhaps visiting memorials, 

participating in public events, 

and things that you normally would't do could be a choice!!