Tom Bergin's (Los Angeles, CA)
As the story has it, a man named Joe Sheridan invented Irish Coffee at the Shannon Airport in 1938, and, soon after, famous SF columnist Stanton Delaplane brought said recipe to Tom Bergin's (and SF, of course), and they’ve been known as “the house of Irish Coffee” ever since. Bergin, a lawyer from Boston with Irish roots, opened the bar in 1935, and it has the second oldest liquor license in LA County, and, as even more legends have it, the creators of Cheers
frequented the bar and used it for inspiration for the show. Though it has since passed on from the Bergin family through two iterations of ownership and was closed for an interval, they’re now back and’ve kept the famed cardboard shamrocks painted with names of regulars that cover the bar's ceiling. And yes, to answer the obvious followup: Kiefer Sutherland IS one of them.
Patrick’s of Pratt Street (Baltimore, MD)
The land of McNulty features America’s “Oldest Irish pub”, which has been in the “same location since 1863, same family since 1847”. If that right there isn’t enough to be on the list, perhaps the fact that, until 2011, the only phone listing for the place was for the grandmother who lived upstairs and died in 1974 is. Or that they used to be so Irish that they didn’t actually open on St. Patrick’s Day, because they “didn't like to see the Irish making fools of themselves on a 'Holy Day’.” Or maybe it's just the fact that, aside from a pint, you can get some of the best crab cakes in Baltimore. Either way, go there, and tell Pat we said hi.