The phrase "a few grinning" is correct and usable in written English.
It can be used to describe a small number of people who are smiling or showing their teeth in a cheerful manner.
Example: "In the corner of the room, I noticed a few grinning faces, clearly enjoying the party."
Alternatives: "a couple of smiling" or "several beaming".
The crowd is homogeneous in its inchoate youthfulness (no aging pop artists, socialites, or countesses in sight) and heterogeneous in its drug use: a few grinning love bugs on ecstasy; glassy-eyed junksters; furtive, Speedy Gonzales cokeheads zipping in and out of the stalls.
Instead, here's a few grinning goons in a wine bar and a trestle table of overpriced on the vine tomatoes.
The heated reaction is about much more than a few grins at a press conference.
He flashed a few grins to acknowledge the jeers and held his arms aloft in celebration after each round, although he only edged them.
A few grins and twinkles are emerging as the season advances, along with some suffering expressions in the darker earlier passages of the work, but most of the dancers present the movement as if it will carry all its own meaning.
It might have initially raised a few grins, but before long they turned into impassioned yelps and fist pumps.
However bad the day has been, Leno, Letterman and company are there to give the audience at home a few grins and let them know that things are going to be all right.
He visited a polling place in Atlanta in the early morning for a few minutes, grinning and greeting a smattering of voters and supporters.
She started at 14 years old, and a few guys – grinning – rocketed their hands into the air; as the ages she called out increased, more hands rose.
The pictures were taken as souvenirs and made, some of them, into postcards; more than a few show grinning spectators, good churchgoing citizens, as most of them had to be, posing for a camera with the backdrop of a naked, charred, mutilated body hanging from a tree.
