There are several co-working spaces in Prague:

* PaperHub at Paralelni Polis - https://www.paralelnipolis.cz/koncepty/coworking/

* ImpactHub - http://www.hubpraha.cz/en/

* Node5 - http://node5.cz/#about

Yep, I was at K10 the entire time. Was just opening when I was there. Very beautiful space and nice folks.