yes, you'll find some good places to play pool, carom and even pyramid. there is at least one superb poolroom . a bit far from downtown but worth the effort.
try to avoid the taxis/cabs if you can , especially at night. Or choose your taxi verrrry carefully. plenty of buses, tramways , and underground.
i remember a small billard room not far from novotna (downtown) with 2.40m tables and one 3.10m , but i cannot remember the adress for now. will PM it to you if i can find it in my archives.
Note than the czesc girls are superb too . If you travel with your family , sorry , else, you'll enjoy 2x time more this awesome town !! hehe
have a good trip ! downtown Praha is one of the most beautyfull place in Europe.
Erriep, Thanks for the heads up. The room was great and the people were very friendly. No English, but we all spoke Carom. Prague was a great city, great vacation.