Eleven people were arrested as police tried to move on up to 40 people thought to be shouting racist abuse in Manchester city centre.
Police were called to two pubs after reports that drinkers, many dressed in red and white, were chanting racist songs and abusing passers-by.
Nine men and two women were arrested on suspicion of failing to disperse when ordered to do so by police.
More than 40 notices to leave the pubs were served on those involved.
A lunchtime St George's Day parade passed through the streets of the city on Wednesday, with people wearing red roses and singing patriotic anthems.
A Greater Manchester Police spokesman said the pubs were later busy with drinkers, the vast majority well-behaved, but problems began at about 1600 BST.
Racist singing first began at about 1600 BST at the Moon Under Water on Deansgate and later at the Mitre Hotel in The Shambles.
The spokesman said: "Greater Manchester Police respects the right of anyone to enjoy the St George's Day festivities and other national events.
"However, GMP will not tolerate racism in any form and when the reports were made officers acted immediately and a number of patrols were sent to the area."
According to this report, the revelers were taunting "asians" which seems to be the UK term for Muslims.
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