Do you know this quote that the true measure of any society is in how it treats its most vulnerable members? I think this applies to businesses too. I have Celiac, so eating at a pizza place is always a dicey proposition for me. Not at Mario's. I felt very safe ordering a gluten-free pizza because the chef personally greeted me, alleviated all my concerns, and baked my pizza in a dedicated oven. This personal touch earned my loyalty. I'll definitely be coming back next time I'm in Frostburg.
P.S. Mario's seems to be a popular place among other customers too - the parking was packed when I was leaving.