Thank you Antonio. I must say I was very worried after reading some newspaper articles about even shops diplaying on their front doors 'faggots not allowed' signs, like this apparently: http://varlamov.me/2017/samiy_dorogoi_hleb/00s.jpg
Not sure how true this is... but this makes me fear that the general attitude toward gays is not exactly relaxed, and I hope I'm wrong...
It is perhaps less liberal than Netherlands, but believe me in Moscow and Saint-Petersburg there is not difference from any other European capital.
Just relax and enjoy your vacations!