If the overnight in St. Petersburg is scheduled (during a one-day transit into the city or hitching a ride), it makes sense to use one of the global or Russian were where to find free housing for a specified owner. You must register on the website, fill out a form and send the request message to the people offering housing.
Registration is available on the worldwide sites (English language) – Hospitalityclub or Couchsurfing, and at major Russian website Happytrip. In addition, community-stay in social networks: LiveJournal, Facebook, Vkontakte and forums travellers, lovers of hitchhiking. It is most convenient to write to several people that will reduce the likelihood of force majeure.
Transit passengers can stay overnight at the airport. Of course, the waiting room is not the most comfortable place to sleep, but on the bench it is possible to stretch out and sleep. At night, the number of departures and landings is minimized, people at the airport will not be very much. In addition, in all terminals of Pulkovo has free toilets where you can wash up, tidy clothes and yourself and cool off. In addition, in buildings of the airports have free wi-fi, sockets for charging electronic devices, designated Smoking area.
Railway stations can also be considered quite a comfortable place for the free nights. Lounges are open around the clock, on benches to sleep. Toilets at Railways stations are free, but only if you have a valid ticket in case of transit. In other cases, the cost of visiting the toilet nominal (10-20 rubles). At the Moscow station of St.-Petersburg has wireless Internet and power outlets, and coffee machines with cheap drinks.
In the case of a difficult situation, you can come into the shelter of the charitable organization "Nochlezhka" on upland street. You can not just sleep and eat, but to obtain legal advice, medical help, advice of a psychologist and a social worker.
Places to stay is almost free
Almost free (from 200 to 400 rubles), you can spend the night in one of the many hostels in St. Petersburg. This price will include not only the beds (comfortable bed in room for 4, 6, 8 people), but the use of a shower, toilet, common kitchen where you can prepare Breakfast, complimentary beverages (coffee, tea) and wireless Internet.