MARTIN’S® Food Markets
Martins doubles coupons up to a dollar, but not including a dollar, but sometimes the have "dollar doubles" that allows you to double up to six $1 coupons. They have a bonus club card that adds points for every dollar that you spend. After you spend $100 you save 10 cents a gallon on gasoline. I'm not sure if all MARTINS stores sells gasoline or not. My MARTINS has a pharmacy, they are pretty reasonable and offer fast service too. They also have a deli, bakery, salad bar, hot bar, coffee cafe, Chinese food and more.
If you want to add anything feel free.

My Martins does not double coupons in Northern Indiana that I know of...

I just found this thread and wanted to let you know that this is not the same Martin's Chain that is in Northern Indiana. When I saw the forum just now I did a little checking.

The Martin's in Winchester, VA only doubles up to (and including) 50 cents. Does anyone know if they have a quantity limit for doubling?

Sorry, I can't help you, I'm not sure.

It is also important to note that they will only double the first coupon of its kind. In other words, if you have 2 $.50 off coupons that are exactly the same, it is best to ring up in 2 orders so they double both of them.