system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 what makes a Pub different from other bars.

The Irish pub owner's AMA had an interesting comment "all pubs are bars, but not all bars are pubs". Being Canadian I love going to chill bars, and one of these that I go to is an irish free house...a pub...but others are just, bars...what exactly constitutes a pub?

*edit: It seems that historically speaking, there was a difference, but these days the difference is simply atmosphere. In pubs you feel comfortable, almost at home. 

*EDIT 2: a couple of different people have asked now...is there a difference between a pub, a tavern and a saloon? or are they different words from different geographies basically meaning the same thing?
gpt
A pub is somewhere you should feel comfortable to spend the whole day and even take children during earlier hours. It should be a cosy place, decorated in a friendly and welcoming manner, if a little naff. There should be games available such as pool, darts and a quiz machine. The better ones will even have dominoes, chess and backgammon sets behind the bar. There ought to be a jukebox around with the entire Led Zeppelin discography or at least get the lads to bring their guitars and fiddles and we'll kick up a tune ourselves.

If you're there at lunchtime hours expect pies, fish & chips and a half-decent tikka masala to be available, if your in during later hours than you'll have to make do with crisps, pickled onions and Scotch eggs. If you're good mates with the landlord, however, he may be willing to make you a sandwich when you're absolutely tanked at 1.30 am.

If the pub takes even the least amount of pride in what they do there will be a good choice of real ales such as Hobgoblin and Old Tom served at cellar temperature as these actually taste of something unlike near-frozen mass-produced lagers. The good ol' water-of-life should be in abundance be it Irish, Scotch, Bourbon or otherwise. In short, a pub is the very focal point of civilised society.

A bar, on the other hand, is a truly dreadful place. Tastelessly decked out in chrome, pine and mood-lighting, this hell-hole is full of wankers from the City getting shitfaced on shite like Bud and Kronenburg whilst listening to god-awful repetitive pop music at near deafing volumes.