The phrase "a couple of mainstream" is not correct as it lacks a noun to complete the thought.
You can use it when referring to a few items or concepts that are widely accepted or popular, but it needs to be part of a complete sentence.
Example: "I found a couple of mainstream movies that everyone is talking about."
Alternatives: "a few popular" or "several well-known".
A couple of mainstream publishers decided against black imprints.
Now his affectionately expressed objection - prompted by the gift of a PlayStation 3 and a couple of mainstream releases – is that games aren't art and that we shouldn't care.
I now know of a couple of mainstream media outlets who have policies of not speaking to anti-vaxers at all when they do science based vaccine stories, which is a fantastic result.
Deen fears she has become the "porn girl who did a couple of mainstream things" – which is more or less where predecessors such as Traci Lords, who acted in a remake of Roger Corman's film Not of This Earth followed by John Waters' Cry-Baby, Ron Jeremy and La Cicciolina got to.
Imagine the scene: I had been invited to join a panel discussion with Louis Michel, the rotund and outspoken Belgian foreign minister, a couple of mainstream Belgian MEPs, and Jens Peter Bonde, a Danish MEP and the parliament's most colourful and long serving Eurosceptic.
While she may be a new face to some of us, the entertainer has actually been in the public eye for over a decade, working as an actress and director in the adult film industry and even appearing in a couple of mainstream films.
What's a parent to do? Get to know a couple of the mainstream Martial arts (judo, Karate, taekwondo and kickboxing, say) and learn what they have to offer and if each is right for your child.
Albeit, it also underlines how low certain tech industry practices have sunk that ethics and privacy is suddenly making a cutting-edge trend agenda, a couple of decades into the mainstream consumer Internet.
We're a couple of years away from the mainstream".
– Market channels that were mainstream a couple of years back take only a small chunk of the go-to-market pie for mobile apps today.
You need risk capital in the form of venture capitalists that know what to back a couple of years before it becomes mainstream and obvious to everyone.
