Hi Steven, finding a decent game of one pocket may be tough - I've never seen it played here. 'Billiards' in Rome is going through a difficult period, many rooms have closed or moved over to card games and video poker as their way to make ends meet.
I've never played one pocket but would be happy to learn and should you be interested I can introduce you to the 'delights' of the Italian table, a real nightmare for anyone from a pool background. It is a 10ft table with 2.75 corner and 3 inch side pockets, if you so much as brush the cushion or points (the Italian translation of 'points' is 'bones' to give you an idea of how generous they are) the ball will not drop. At this point you may be thinking to yourself - ok its a super tight table (not as tight as Russian pyramid) I can handle that - however there is one more little detail that is the real problem, the cushions are at least 60 mm high and a pool ball is only 57 mm. This means you are nearly always hitting down on the cueball and if the white is touching the cushion (and I'd swear those cushions have magnets to attract the white) it is literally under the cushion and you have to jack up to 40 degrees to avoid miscueing.
Let me know if you're still coming and want a game of pool or 8-15 which is the Italian game played on these tables using pool balls.
Mike