Try here Abu, krakowmuslims.webs.com/
Mosque in Warsaw mzr.pl/pl/
Good luck.
Related:
Places to swim indoors in WarsawHi all, Im going to Warsaw in about 14 days and will stay there for approx. one month. I would like to start my days by going for an indoor swim. Do you know of any places near ul. Jana Olbrachta / Gorczewska where I can do this?
This is your best bet for swimming in Warsaw. You'll get there without problems. 20 zł/hour, olympic size pool...co-ed sauna. Looks like a nice place :) 10zl/hour with the reduced price seems very reasonable (Im a student).
wodnypark.com.pl/index.php?lang=en