The guys do look more interesting to you. When you get close to their table you notice they are all speaking Russian. The guy you spoke to earlier sees you approach and jokes, "Ah, so you are not so timid!"
He introduces himself as Vlad and one of the others calls out "tsepesh" and laughs. He then introduces the others to you. The rest of the night is great and you don't have to pay for another drink. The guys are very funny, but sometimes they joke to each other in Russian, which gets annoying. You have to work the next day so you don't stay up too late.
You thank them for a great night and head back to your quarters.