'Que haces en la cocina?' = what are you doing/why are you in the kitchen? 'Que estas haciendo en la cocina?' = 'what are you doing/up to in the kitchen?' (I'm not absolutely sure about these; 'my best shot')
It means, "What do you do on the bicycle?"
What do you do in your favorite room?
What do you do in your free time.
What do you do in the summer?
what the heck are you doing on the computer Johnathan
What shape is your kitchen table.
???you tried google translate??? No but seriously, "what are you doing at the table girl?" there,
¿Que haces en el teatro?
what are you doing cousin
"What do you do when you're in a park?"
It means, "What does a member of the family have to prepare in the kitchen?" The 'have' in this case is as in, "The bill is due. I have to pay it."