I'm a student so I try not to eat out too often but I still end up spending ~ 75-100$/month on eating out at social events (=1-2 times a week plus the occasional coffee/ice cream) and at least double that on groceries....I try to eat healthy/well-balanced meals which makes it a lot more expensive. I eat quite a lot as well for someone my size--I suspect I have an unusually high metabolism.
It helps that I'm super-cheap so it's not hard for me to prepare food at home rather than eating out, when I know how much money I'm saving.
And I thought the thread was about something way more interesting. Way to disappoint.