The phrase "a showcase at a" is correct and usable in written English.
It can be used when referring to an event or exhibition where something is displayed or presented, typically to highlight its features or qualities.
Example: "The gallery will host a showcase at a local art fair to feature emerging artists."
Alternatives: "an exhibition at a" or "a display at a".
She played Surry Hills pub in Australia, alongside Sydney dance maestros the Presets and Stereogamous, as well as a showcase at a London pub, the Old Blue Last.
But it was the 1959 Broadway production of Lorraine Hansberry's "Raisin in the Sun" that originally persuaded Mr. Ward, among others, to create the company for African-Americans, who he said needed a showcase at a time when few quality opportunities existed for black actors, writers and directors.
Years later, in 2008, Jeff's old Class AA teammate, Greg Morhardt, was assembling a team of prospects for a showcase at the old Yankee Stadium.
The two thieves smashed a showcase at the cathedral in Strangnas, a town on Lake Malar, on Tuesday, according to its dean, the Rev. Christofer Lundgren.
The past 12 months have seen them spreading their party aesthetic around the world with a stint at Berlin's Berghain, a US tour and a showcase at Barcelona's Sónar Festival.
Or maybe a showcase at South by Southwest?
Songwriters get a showcase at Joe's Pub this weekend.
She played downtown clubs, composing 30 to 40 songs a year, recording two records on her own that she sold at gigs, until a showcase at the Knitting Factory led to an introduction to the Strokes' producer, who offered to work with her.
In a showcase at Le Poisson Rouge presented by Wordless Music, he's performing with GAVIN RUSSOM among others.
New British cinema is getting a showcase at the ICA this month.
Last June, they played a showcase at the tiny Borderline club; this June it's Wembley Arena.
