[jeremyswank]

There's at least one on Vodičková near the Lucerna, and one in the Poliklinika in Břevnov, too.

[kubbing]

2-3 more at czech technical university. faculty of electrical and mechanical engineering.

[r080]

According to this site http://paternoster.archii.cz/seznam-paternosteru.html there are almost 30 of them in Prague.