Once decoded, the message read:

Club Pitelyt, Vyborg, Leningrad Oblast. April 2, 14:30, table 13.

You will wear a cotton T-shirt, one size too small, regardless of the weather.

Sit without speaking and order the house brew when approached by a waiter.

You will empty your pockets on the table.

Our conversation will take place only when music is playing and the waiter’s back is turned.

At 15:00 the conversation will end regardless of its substance.

You will wait one hour before leaving the way you came in.

Tell no one.