The phrase "a workshop that was" is correct and usable in written English.
It can be used to refer to a specific workshop that took place in the past.
Example: "I attended a workshop that was focused on improving public speaking skills last year."
Alternatives: "a workshop which was" or "a workshop that occurred".
The couple met in 1977 when both attended a workshop that was part of Chicago's Gay Pride Week.
The aim of this paper is to synthesize discussions of a workshop that was developed as part of the ISCTSC10 conference.
Raimondi eventually became the engraver of Raphael, organizing a workshop that was dedicated primarily to making reproductions of that master's work.
Note: Several chapters in this e-book were published as a result of a workshop that was organize at CES in April 2017.
He looks like just the kind of androgynous, long-haired model Leonardo loved to portray and, said his 16th-century biographer Vasari, surround himself with, in a workshop that was the Renaissance precursor to Warhol's Factory.
In October, I helped out at a Boston workshop as a trainer in training; and in December, I co-taught a workshop that was co-sponsored by the Rochester Regional Library Council and the University of Rochester.
A workshop that is freeform, but lightly constrained.
Dyeing is done at Takahashi Toku, a workshop that is only a short bike ride from the Chiso headquarters.
6. Successful completion of a workshop that is offered in land use, community and economic development, international planning, historic preservation planning, real estate, and urban design.
"There's a vibe in a workshop that is hard to imagine, the way the directors and writers and musicians and actors and choreographer interact, and how things unfold, say, once script rewrites come in.
One reading was a new musical version of "Sweet Smell of Success," a workshop that is to provide Mr. James with his first real musical leading role, as a sycophantic press agent in the orbit of a gossip columnist, played by John Lithgow.
