Is this the official way to organise meetings in Moscow - you report that you are going to organise a manifestation and police / city council decide where you can have it? Or was it some informal advice, such as "police will likely not harass you if you meet at Teatralnaya ploshchad"?
It is the official way
More photos here: http://ru-transhuman.livejournal.com/384043.html
This was first legally approved political action of Russian transhumanists. Symbolically it was near Karl Marx monument which is opposite to the Big theater.
Main slogans:
"Stop aging - it is main goal for the state".
"Live 150 years!"
"Immortality!"
"Right to live!"
"We are against death"
The main cognitive bias that played here was that we will be crashed by police. Nothing happened.