The association says the ticketing requirement was not discussed at a meeting that was held on Friday.
The Music and Entertainment Association says the ticketing decision for nightclubs shouldn't have been thrown in at 'the very last minute'.
It says the requirement for people to buy tickets to get into nightclubs wasn't discussed at Friday's meeting.
The Government took the decision after holding talks with the industry and the new rule for entry will take effect next week.
MEAI spokesperson Matt McGranahan says it'll be very hard for many venues to bring this ticketing step in, particularly in rural areas:

€1.2m Approved For Zipline And High Ropes Adventure Centre At Donadea
Christmas Appeal To Adopt Dogs As Euthanasia Figures Rise
Speed Enforcement To Increase In Kildare With 21 New Camera Zones To Be Rolled Out In January
Over 400 Motorists Caught Speeding So Far Today, Including A Driver In Kilcock
Transport Minister In Discussions With Irish Rail About Extending Late-Night Trains Beyond Christmas
Tadhg And Mary Should Be Looking Forward To Christmas, Say Gardai As Fresh Appeal Launched
Bus Shelters Treated As Luxury Rather Than Standard, With 500 Kildare Bus Stops In Need Of Upgrades
Recruitment Announcements Don’t Add Up As Garda Numbers Stagnant In Kildare South, Says Local TD