Rodion Krjutškov
Google
I am a native of Saint Petersburg, and this is the most interesting art space I can recommend in the city. Here you can not only see art, you can also meet the artists and see them work in their studios. It is an amazing opportunity to learn and immerse into the atmosphere of the real modern Russian non-comformist art. Also it has a very nice creative atmosphere, for example you can go play music in the Gallery of Experimental Sound. This kind of stuff. It's worth a visit!