No more than six people are allowed at a table in restaurants and cafes from now on and a record must be kept of what customers order.
Fáilte Ireland has updated its guidelines for the industry to stop the spread of COVID-19.
There should be a maximum of six people from three separate households dining out together, while businesses and services must keep a record of what each person orders.
Furthermore, the time and date of the customers' arrival must be noted.
The name and contact details of one person per party must be recorded for both walk-ins and booking and all details will be kept on file for 28 days.
When it comes to drinks, all straws must be individually wrapped and embellishment or decoration of glasses like cocktail umbrellas should be minimised.
The new guidelines come as the Dáil debates new powers for Gardaí to shut down pubs and restaurants who aren't complying.
Adrian Cummins, CEO of the Restaurants Association of Ireland, said they were not made aware of the guidelines around keeping records of what customers order.
He said: "This has just slipped in without any consultation with the Restaurants Association of Ireland.
"This will just add more regulatory burden to our members and considering that moves are now afoot to try and get wet pubs open in October, this will effectively be null and void in four weeks time."
Reporting by Kim Buckley