Ruslingua linguistic center has been offering courses in European languages as well as Russian since 2005. This excellent language school has individual and group courses for expats, visitors and revision courses for university students and can organise home stays. There's a specially dedicated conversation class and they also offer trips with a teacher to the local market to practise your language in real life situations. They also offer a special one day course on how to talk to taxi drivers and chauffeurs which is especially useful if you will be being driven around a lot in Moscow.