Mr. K's is a Charlotte institution. My boyfriend grew up in the area and frequented Mr. K's with his brother, so was very excited to take me there when I first moved to town. Since then, we have been multiple times, and every visit is a wonderful experience.
The tiny restaurant is a greasy dive with the best onion rings in town (as the sign proclaims) and delicious ice cream desserts. Everyone who eats burgers comment on how good they are; in my case, I can vouch for how great the chicken fingers are. The milk shakes are to-die-for and come in so many flavors they rival Cookout. The brownie sundae is also a great sweet treat option and with a scoop of ice cream covered with chocolate and caramel syrup and whip cream.
The owner has been there cooking up the food every time we've gone in, and the employees are always very friendly and accommodating. The best update to the restaurant is that it now takes debit and credit cards, so you don't have to worry about stopping for cash if you're like me and only carry cards.
We highly recommend Mr. K's and think everyone who lives in Charlotte should check it out.