How to use "guys" in a sentence

And sometimes the cases are interesting, and he likes having some good stories to tell the guys in the pub

Hundreds of gamblers - pretty young women, sweet-faced grandmothers, men in jeans and decoratively stitched Western shirts, retirement-age men in expensive but tacky leisure outfits, a few guys in three-piece suits, salesmen, doctors, mechanics, secretaries, Americans from all of the Western states, junketeers from the East Coast, Japanese tourists, a few Arab men - sat at the semielliptical blackjack tables, pushing money and chips forward, sometimes taking back their winnings, eagerly grabbing the cards that were dealt from the five-deck shoes, each reacting in one of several predictable ways: Some players squealed with delight; some grumbled; others smiled ruefully and shook their heads; some teased the dealers, pleading half seriously for better cards; and still others were silent, polite, attentive, and businesslike, as though they thought they were engaged in some reasonable form of investment planning

"Who are you guys?"

A silencer-equipped pistol, lock-release gun, truth serums - their apparatus indicated that these guys were part of a sophisticated outfit with substantial resources.

Which set of letters do you guys work for? Not the FBI

Let's get you packed and the hell out of here before any more of these guys show up."

"I know a couple of local guys," Elliot said

"Those guys'll spot the problem in a minute."