He urged anyone who had noticed people or vehicles at the RSA about 4am on Monday to call the Kerikeri police station on (09) 407 9211.
In a social media post a staff member said the organisation was struggling as it was, so it was frustrating to have hard work taken away by ''selfish low-lifes''.
A spokesman for the RSA said the club had hosted two successful events during the weekend and the takings had not been banked.
''The girls worked extremely hard in the kitchen over the weekend so they're pretty devastated.''
He urged the public to look out for six canvas bank bags and four old cash trays which may have been dumped somewhere.
The thieves also took members' subscription cheques written out to the RSA which were of no use to anyone.
Police inquiries are continuing. The amount of money taken has not been disclosed.