Do not go anywhere in Moscow before you have gone out with these guys. It is the best way to be introduced to Moscow nightlife and people. They take you to a few nightlife spots, not necessarily pubs. The pubs and people change by night, so you could literally do it every night and not go to the same place or with the same people.
We started off in a pub, then a live music venue. From there we went to another dance club and ended up in a trendy nightclub. Different activities at different venues, with points awarded for each activity. You don't have to partake, but it helps.
I was the only foreigner in this group of 20, but there is enough Moscovites that speak good English, so don't despair if you don't speak Russian.
I went back to one of the places we visited as it was an awesome place. Thanks guys.