I feel obligated to write a review for The Frosty Mug, since a great group of work friends and I have been going almost every Thursday night for over two years. Â While the Mug is a bit of a dive (wood panelling, smallish, very local), it is a very worthwhile dive. Â I'd recommend it over every other bar/eatery in the Mt. Vernon area. Â It is fine to take a family there to eat for dinner, but it is very much a bar after eight, and I wouldn't take any of the numerous children that I don't have there on weekend nights.
They have a number of TV's and are usually showing whichever sporting event of most import is playing at the time. Â
The food is very good, and having tried a good portion of the menu over time, pretty consistent. Â They smoke their own meat and I've had some exceptional brisket, pulled pork, and steak sandwiches. Â They have lunch and dinner specials, and you get a lot of food for what you pay for. Â The food is MUCH better than the popular Buffalo Wild Wings in Mt. Vernon, unless you are only in it for wing sauces or are twelve or wear Tapout shirts and are a dipshit.
They cater as well.  A note to employers:  Your charges will fawn all over you and pay for their own office supplies and overtime if you give them big metal tubs of pulled pork  (This is not conjecture, this is highly refined business acumen talking [I go to Staples lots]).
There are only a few (5?) beers on tap, but the lack of selection is negated by the large (frosty?) mugs they serve their draft beer in (they also have small and medium sized mugs for, presumably, fools).
The staff is seasoned and very friendly. Â Every once in a while when it is crowded it takes a while for someone to get to your table to refresh drinks, but they do an admirable job nonetheless. Â Very rarely is an order messed up. Tip them well so they feel good about themselves.
The place gets packed on Friday and Saturday nights, if that's your thing. Â It is probably because A) there just aren't many good bar options in Mt. Vernon (what, do you expect me to go to The Depot and get stabbed?) and B) those bigass beer mugs are conducive to imbibing and fun.
The Mug is a good place to get a drink in what isn't much of a selection in Mt. Vernon. A lot of locals here, and the staff will remember you and your drink of choice fairly quickly. The venue is nothing special. The seating is a bit limited because the bar is kind of a hole in the wall. They have pretty good food served until 9:00, and they sell packaged liquor with a drive-thru.
As far as entertainment, there's a jukebox, a dart board, a pool table and a golf video game. They have put in a flatscreen tv, and they have another TV with the NFL Network. The prices are really good. You can get a 32 oz Import draft for $3.75. They have installed a patio in the back to accomodate smokers and have plenty of parking.