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:

Survivors’ Stories And Counselling Gave Kildare Woman Maeve Leahy Strength To Speak Out About Abuse
€34.5m Boost Backs Quest To Study Memory Loss And Build 3-D Biodegradable Spinal Supports
13 New Gardaí For Kildare - But No Increase For Part-Time Maynooth Station
Kildare’s Rain Warning Brought Forward To 9am As Remnants Of Storm Claudia Approach Ireland
Christmas Gift Caution As E-Scooters Leading Cause Of Child Brain Injuries
€540k Worth Of Ketamine Seized In Major Kildare Raid
Mother Of Late Harvey Morrison Focused On Change For Children With Spina Bifida And Scoliosis