Hi Giorgio,
This Friday you can dance salsa in following clubs:
Salsa Loca
Lensovet Palace of Culture, 3rd floor
Kamennoostrovskiy Avenue 42
Petrogradskaya metro station
21:00—23:30
Mostly LA and NY styles of salsa
Oxford
Nevskiy Avenue 105
Ploshchad Vosstaniya metro station
23:00—05:00
Mostly Cuban style of salsa
You can call me freely (my phone number is in my profile).