The phrase "a certain bar" is correct and usable in written English.
It can be used when referring to a specific bar that is not named or when the speaker assumes the listener knows which bar is being discussed.
Example: "I met her at a certain bar downtown that has the best live music."
Alternatives: "a particular bar" or "one specific bar".
"It's a signal to employers that you've passed a certain bar".
It should be said, however, there is a very nice line about the experimental jazz that Frank and Ian are dismayed to hear coming from a certain bar.
Nettie likes to patronize a certain bar on lower Sixth Avenue that "did not partake of the hip": "It did not ape the lower depths.
Not long ago, women walking under the Brooklyn side of the Manhattan Bridge would try to avoid a certain bar at the corner of York and Adams Streets.
He grew weary of worrying that he would be spotted a certain bar in New York or that someone would tag him in a picture on Facebook that would reveal he had lied about who he was spending his time with.
"Those were the days when gay bars were a dark door somewhere in Manhattan, where people wanting to go to a certain bar got off the subway a station before or after the convenient one, lest they were suspected of being homosexual," she wrote, in a postscript to the novel, many years later.
This is a short film featuring the celebrant; at its most expressive, it can evoke the work of Fellini shot through with the sensibility of Mel Brooks (memo to Cannes: This should be a sidebar -- "Un Certain Bar Mitzvah").
He says: "The first thing I got was literally some random company who wanted me to mention a certain chocolate bar in my video for £50.
He recommends a certain hash bar in Amsterdam and explains that the city's prostitutes are licensed and unionized -- protected by "the law, not pimps".
Only 20% of all applicants get in, as the company denies those it doesn't believe meets a certain quality bar.
But what is funny though, we know from our data that women don't consider a product to be of high quality unless it is above a certain price bar.
