Tzemach Atlas has an exclusive interview with Rabbi Dovid Karpov, whose synagogue was forcibly taken over by Chabad's 'Chief Rabbi of Russia' Berel Lazar.
According to the interview, Moscow has 8 or 9 functioning synagogues (although most are "old mens' clubs" where the 'minyan' comes to drink vodka and eat herring). Rabbi Karpov's is one of the only ones with active classes and programs, and with a younger membership base.
Rabbi Lazar's hostile takeover has forced the classes to stop and kept people away from the minyan.
Worse yet, Chabad has only 80 families in its Anash telephone book (i.e., actual Lubavitchers). Of them, only 3 families are native Russians, the Karpov's among them.
Pretty pathetic stats for the "world's largest" hasidic group and outreach organization.