Greg saw the gawker, and stepped subtly closer to Jack, although enough to be noticed by those who Greg wanted to notice.
"Hm. Gimme a slow screw against the wall." The bartender smirked, and Greg flashed the (ironically matching) engagement ring he had on to the bartender. "Sorry, sugar, I'm taken" He'd let him draw his own conclusions about who was doing the taking- if it kept Jack from getting harassed, oh well.