About two years ago two close friends of mine went on a heliboarding trip in eastern Russia. Before the boarding, they went out and got weird looks when they o

About two years ago two close friends of mine went on a heliboarding trip in eastern Russia. Before the boarding, they went out and got weird looks when they ordered vodka tonics. They asked what the problem was, and were told "everyone" there drinks it straight. Any russians in the audience care to clear things up?