The post — which was liked more than 10,000 times — was met with comments from others ridiculing the burger chain.
@havykarl wrote: "This may actually be the stupidest thing I have ever seen. And if you know any of my mates, you'd know how big of a call that is."
"Where is this place, I'll go past with some roundup" wrote another critic.
"Who knows what they're thinking. My elbows would be itchy," wrote another Instagrammer.
Other people called out how impractical the table covering was, and wondered how on earth you'd balance a drink on the table.
The Grill'd company tried to capitalise on the attention by offering the poster a free burger if they would come down to the restaurant and "mow" the grass.
Some were into the turf-table though, writing "love this idea. Would make me feel more down to earth without being bitten by green ants on my a**".
The Grill'd website says the company is "always pushing to do better by the environment, and respecting Mother Earth is in our DNA".