Moar advice as a business owner and dive-bar lover:
Keep overhead LOOOOOWWWW. Easy in theory. Tough in practice, unless you get in those habits early on. I like dive-y bars. Ones where they have to keep it damned near pitch-black in the place so you don't see how filthy the walls are. Bitchy bar-maids who want you to order your berkeleying drink and get the berkeley out of their way so they can make more money. Juke-box in lieu of a DJ, and the type of crowd who's attracted by the idea of cheap drinks and loose women, and couldn't give two E36 M3s about what music is playing or how lovely the atmosphere is.
All these things lend themselves to low-overhead.
If you're going to serve food KEEP_IT_SIMPLE. So simple, a monkey could do it. If you sell a burger, it's a good, greasey slab of meat on a bun, unless you order cheese. Then it's a cheeseburger. Bring ketchup and mustard packets out with the burger. Have a small grill for burgers and dogs, and a fryer for wings and fries. Do those 4 things really well, and people will buy them. Don't like the food options? Tough luck. It's a berkeleying bar. Want a salad with your beer and service with a smile? Go to the berkeleying olive garden, nancy.
Don't have 8,000 beer choices either. Leave that for Taco Mac, where a pint of Iron City (berkeleying swill,) will set you back more than a 6-pack. Have a Lager, a "light" beer, and the cheapest damned beer you can find on tap (this is where your "dollar drafts" come in,) and maybe a few ridiculously priced medium-grade beers (heineken, newcastle, etc,) in bottles. Maybe throw in ONE local microbrew for the snobs.
Build a man a fire, and he'll stay warm for a day. Set a man on fire, and he'll stay warm for the rest of his life.