Macau, would never work, it's got a place that's so narrow they have a permanent yellow flag! Ralph Firmin's demo is the closest we'll see to it happening.
Pau, not sure about, they used to have to have non-championship races there back in the 60s and the circuit hasn't changed since then.
Norisring is certainly wide enough, but they'd need to lengthen the lap it's probably about as long as the Silverstone National circuit or a bit more
There are plenty of ones in America that could work, like Long Beach, like Belle Isle
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