LOS ANGELES (CBSLA) — Celebrities and gym members took to social media to call for a boycott of Equinox and SoulCycle after it was revealed that billionaire Stephen Ross, who owns the fitness centers’ parent company, would be hosting a fundraiser for President Donald Trump.

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The fundraiser is scheduled for Friday in the Hamptons.

Both companies posted statements to Twitter that said they are not involved in the fundraiser and do not endorse it.