The Raetihi Bowling Club has been significantly damaged by fire - making it the fourth serious blaze in less than a week in the wider Whanganui area.
The fire happened just before the club's centenary, Raetihi fire chief John Compton said.
The brigade was called out at 4.51 on Tuesday afternoon to find the Duncan St building well alight.
"I think it could have been a problem in relation to material and equipment," Mr Compton said.
He did not see any indication the fire was deliberately started, but said it was under investigation.