These pictures taken at Bolehills Crookes on Monday evening show groups clearly ignoring social distancing rules.
A Crookes resident said the crowds are a regular occurrence.
“It's a joke. I know we can meet outdoors now as that is what people will say but this is absolutely ridiculous. They don't care,” he said.
A spokesman for South Yorkshire police said: “Until at least 29 March, people should only meet one other person from outside their household in a public outdoor space. This is unless an exemption or support bubble applies.
“We urge everyone to continue to adhere to Covid-19 restrictions as lockdown measures begin to ease. The virus is still very much present in our communities and we need to minimise the wider risk to public health.”