A dinerphile can usually be detected by looking at their television. If the Food Network and Cooking Channel are permanently tuned in, and they continuously rant about the latest episode of Diners Drive-ins and Dives, they are most definitely a certified 'dinerphile'.
Bill spent all his time at work looking up new recipes on the internet. He was addicted to cooking. Bill was a dinerphile.
Tom ate out everyday for breakfast, lunch, and dinner. He spent all of his waking moments surfing the internet looking for new places to eat at. Tom is a dinerphile.