She said they were hearing a lot of people were excited about the night - which is open to anyone - and they expected about 100 people.
Mrs Chater said the festival had established itself as a popular event over its nine years.
Saturday night was almost sold out with 400 people expected, and tickets were also selling fast to Friday night with about 100 left.
"People need to get in so they don't miss out."
She said the festival attracted a lot of out-of-towners.
"I think it is so popular because Andy and Sarah [Uhl, the owners] have managed to bring an authenticity.
"It's that genuine feel mixed with the Kiwi Okere Falls vibe. You just can't get that anywhere else."
For a full line-up of events - and details of which are free and which are ticketed - go to http://okerefallsstore.co.nz/beer-fest/.