Wow, Giorgio, welcome then to Mother Russia
) Hope you'll like it here
Too bad I'm not anywhere close to St.Pete or Moscow, otherwise I'd love to show you around. I'm sure though that there will be enough guys (and possibly ladies) to be your salsa guides. In the meantime, I would recommend you check the following link: http://www.mambotribe.org/clubs/
provided you can read Cyrillic
Good luck with your salsa adventures in Russia!