Bars nowadays are more cooperations like how Cheers became by 1987 after Sam sold the bar. Bars I've been to haven't been anything like "Cheers" even though it's a fictional show but there is a real "Cheers" bar in Boston. Cheers seems to make great business during the afternoon hours assuming weekdays. I'm my area of the larger cities bars have maybe a handful of people in the afternoon hour. Usually restaurant/bars do business in the afternoon. And most of them are people in their late 40's, 50's or early 60's.
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In reality; a bar like Cheers would cater to a slightly younger urban professional crowd (Yuppies of today).
You would not see people like Carla working there. You might in fact see a guy like Sam owning it - but he would probably be behind the scenes. He would hire young hot-shot attractive men and lady bartenders.
Boston proper is a very expensive area.
I do not think you'd see a Cliff, Norm or Woody there. You would see a Frasier type however a bit younger.
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I assume the old bars do. Like that have been owned by the same guy or family for 40, or 50 years.
Movie Theater: Young Frankenstein 10/10. RIP Gene Wilder. One of the funniest people of all time.