How to listen to music cd in library?

Many HelMet-libraries have their own music department. You find the list here (sorry, but the information is only in Finnish) http://www.lib.hel.fi/fi-FI/musiikkiosastot
Libraries with music department have cd-players for listening music in library. Greatest and most diverse collection of music offers Library 10 http://www.lib.hel.fi/en-GB/kirjasto10
There are four fixed cd-players and also headphones to loan for music listening. Also other HelMet-libraries have smaller cd-collections and fixed or portable cd-players for library patrons. Some libraries have also cd-towers for music listening. Maybe the best way is to contact your library beforehand and ask about possibilities to listen music there.