Up to 70 people attended a Love Music Hate Racism gig in Harlow, Essex, on Saturday of last week.
The night was organised in response to an arson attack on the local Islamic Centre in August.
Assistant secretary of Unite Against Fascism Brian Richardson was a guest speaker at the event.
He said, “Events like this are an important way to celebrate multiculturalism”.
But Brian warned against being complacent following a recent racist attack on a young man in Harlow and the racist propaganda of the hard right Ukip.
Acts on the night included a Russian singer, two spoken-word artists, a rap group and a DJ. The event raised £75 for the young man in hospital following the racist attack.
It also raised £350 for a campaign to keep a Welfare Rights and Advice centre open.