A Perth dad of Aboriginal descent found the best way to tackle the racist remarks he overheard in a Fremantle cafe: offering a good old-fashioned cuppa.

Jarred Wall, 31, was having lunch with his fiancee and his two children aged four and one at Zephyr's cafe in East Fremantle on Thursday when he overheard two women having a conversation about Aboriginal people.

In his post on Facebook, which has since gone viral, Mr Wall said "the conversation was less than distasteful with words like assimilation thrown around willy nilly. I could have unleashed a tirade of abuse but that wouldn't have helped."

Instead he did the opposite: he shouted the two "elderly ladies" a pot of English Breakfast tea with a special message on the receipt saying "enjoy the tea! Compliments of the 2 aboriginals sitting next to you on table 26".