Tighter COVID-19 restrictions by the state government were introduced last week after an increase in coronavirus cases.
The local businesses trying to cut losses while adjusting with tighter restrictions are now looking for ways to cope with the no-shows diners.
Frank, manager of La Casa restaurant in Goulburn, has been in the business for over four decades.
The restaurant is only permitting entry to diners who make prior reservations.
He feels that the restaurants had been facing this issue of no-show diners even before COVID-19 restrictions were implemented.
"We can't do much about it. Restaurants should implement measures like charging diners 20 per cent at the time of making a reservation," he added.
"Any other measures that can help cut losses for businesses during this time should be implemented."
The state government had announced tighter coronavirus restrictions from July 24, including limiting bookings to a maximum of 10 people for restaurants.
Similar restrictions were announced for pubs, cafes and bars as well.
Tim Steele, manager at the Royal Hotel at Bowral, is happy that "they are able to open".
Mr Steele has noticed since the past couple of weeks, despite making the reservations, several diners don't show up.
"We generally ring our weekend bookings on Thursday and Friday to confirm. We find that lot of them cancel or don't turn up," Mr Steele said.
"We could fill up quite quickly if those people cancel earlier."
He is asking the community to support them during this time.
"We are doing the right thing and keeping the place clean and tidy. Everyone should come and support us," he said.
"The pandemic is here to stay. As long as we maintain social distancing and other health guidelines, it should be fine."