I'm out. Krystal or White Castle.
I remember having White Castle once when I was very young. I think the cook dropped the oil container into the hamburger making it a grease burger.
I would never get them again. To each his/her own.
Five Guys is more acceptable to my taste buds and because I am somewhat health concious, I don't go that often.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).