Irate protesters descended on Mt Hawthorn's Paddington Ale House on Thursday night to disrupt a campaign event for One Nation Senator Pauline Hanson.

The Paddington was hosting Pots and Pizzas with Pauline and the group responsible for the protest, United against Bigotry and Racism, arrived shortly after Ms Hanson about 6.20pm.

About 40 people carried banners and signs bearing crossed-out Nazi symbols and 'Fascist Free Zone' slogans.

Members of the far-right True Blue Crew, "against Islamisation, open border policies, refugees, asylum seekers" were among One Nation Supporters inside the Paddington.