I owned a bar in Orlando for much of the 00's. We had a NIB Simpsons Pinball Party.
It's a crazy tough business. This is not something you can just set up, and let it 'run itself'.
Prepare to forfeit your personal life.
Prepare to sleep very little.
Prepare to deal with crazy people on a daily basis.
Prepare to break up fights.
Prepare to deal with insane amounts of peoples' personal drama.
Prepare to become comfortable with generally seeing people at their worst behavior.
If you decide to bartend yourself, prepare to assume the duties of a de-facto pharmacist, clergyman, and therapist all at the same time.
Prepare to constantly be on the lookout for employees who will tell themselves that giving away free drinks to their friends SOMEHOW ISN'T stealing from you.
Prepare to have a very comprehensive (and expensive) Liquor Liability Insurance policy, so you don't have to worry about defending yourself and your business against folks who will actually try to SUE YOU for serving them alcohol before they made the poor decision to get behind the wheel of a vehicle.
There are a thousand more points I could list, but my PTSD is starting to kick in already.