How do I get rid of the smell of cooking oil from a large place such as a pool hall?

I own a pool hall and i just installed a kitchen. Everything is great except customers complain that they go home smelling like a french fry. My employees have complained of the similar stench.How do I get rid of the smell of cooking oil from a large place such as a pool hall?
A large hood over the fryer blowing the air out should help this.How do I get rid of the smell of cooking oil from a large place such as a pool hall?
Don't forget to hide the body.