Like everywhere in Italy, a membership card is required for all
gay saunas and cruise bars, usually the Arcigay UNO CLUB card.
In Milan, the Arcigay card is also required for some of the gay parties.
If you don't have an Arcigay card yet,
you can usually acquire it at the entrance of the venues that require the card.
(For foreigners it is 8 € for 3 months. When you acquire the card you need to
show your photo ID card; after that you only need the membership card.)