What places in Eastern Europe are better to visit for a single guy?

I dont know but stay away from the Russian girls, this is from personal experience.
They are very materialistic and I don't believe they have a heart.

I was going to suggest Russia:)

The person before me makes a huge generalization, probably based on just a single experience. I would suggest going to Moscow since its the most European of the russian cities. There's plenty to do both in regards to culture (tons of museums, etc) and just plain old fun (tons of clubs, bars, casinos right downtown, etc).

well moscow for the most part is expensive,prostitution is at its high point in moscow also. si dont get miscued if they dont work and have anything likely they are hooking, if not from a very well to do family there.
how about the czech republic, latvia belarus. all have prostitution problems, hiv rate is at its highest point in along time.
moscow is highly patroled these days, so unless you are with a group prepare to be searched, by humans and dogs, whom smell both explosives and drugs,alcohol. and if you are even looking either way you cAN BE PICKED UP IN MOSCOW KNOW,PER PUTINS ORDERS. cuts down on street robberies and children being raised on the streets.

the best place wouldb krakow pl,then st petersburg,then prag it depends what ur looking4