Are there any dance/trance clubs in Amsterdam or Prague?

Wondering if there are any proper dance or trance clubs with exclusively that music as their theme and attract a large crowd. Furthermore, was wondering if also Krakow, Berlin, Budapest has such clubs aswell.

Here are the bigger and better known ones in Amsterdam (can't vouch for them personally as I haven't been since I was a student which is a few years ago now), but I included the websites so you can read up

Amsterdam
Club XL http://www.xtralarge.nl
Powerzone http://www.thepowerzone.nl
Escape Venue http://www.escape.nl
iT http://www.it.nl
Melkweg http://www.melkweg.nl
Sinners In Heaven http://www.sinners.nl
Paradiso http://www.paradiso.nl
MaZZo http://www.mazzo.nl
Time (item) http://www.ams-protocol.com