[pragueexpat]

I know of 2 in Prague. One in Těšnov 5 and the other in Komerční bank on Václavské Náměstí. Surprising how many people are scared to ride the whole loop.

[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.