lunch eaters 

People who contribute nothing useful and only show up for the free lunch

Without Joe the place would fall apart. Couldn’t the other guys take care of it? Nah, they’re a bunch of lunch eaters.

lunch eaters by Dan182 September 20, 2009

Typical Lunch Eater 

describes a person who is not known for anything good and is just there, taking up space.

Megan is a typical lunch eater.

Typical Lunch Eater by Lipz April 17, 2005