EU-E: looking for tango in Vienna, Crackow and Warsaw

[Irwin L. Singer]

Any recommended tango events/milongas/practicas in Vienna, Crackow or
Warsaw?  I'll be there, with free evenings, as follows:
Vienna 2 - 8 sept
Crackow  9 - 12 sept
Warsaw 13-14 sept.

Thanks in advance.   Irwin