Getting money for bread!

Hi there, I'm traveling around the world by bike and sail and will be soon running out of money. I'm now in the russian phase and wonder if i don't find a job for the invitation (working visa), is it possible to get in with a tourist visa and work under the table in bars or so on.... anyone with that experience?

Anyone from St-Petersburg who'd like to share a flat starting sept.
Marc

Most of those who come from the Ukraine or the Caucasus, China and s.o. work with no visas AT ALL.... In Moscow, at least.