Protesters gathered outside Starbucks on the tenth anniversary of the International Day Against Torture.
The group handed out leaflets to passer-bys to advertise that the coffee shop has an outlet at Guantanamo Bay for US soldiers.
The protest was one of a number of events organised to recognise the day by members of Brighton Against Guantanamo, formally the Save Omar group, and Brighton and Hove Stop the War.
There were also bands and street theatre at The Level and a public meeting called Is Torture Ever Acceptable? with speakers Bob Brecher, the author of Torture and the Ticking Bomb, Andy Worthington, the author of The Guantanamo Files and Louise Purbrick from Brighton Against Guantanamo.
Naomi Vernon, 26, from Hanover, Brighton, was one of the Starbucks protesters.
She said: "Starbucks is kind of condoning Guantanamo being there by making it seem more normal.
"There are world leaders calling for its closure yet Starbucks is still making money out of it.
"People there are being tortured in the very place Starbucks is selling coffee to the people who are torturing them."
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