Out of the 10 Diamond Professionals where I play, 1 has 4" pockets, 6 have 4.5" pockets, and the 3 in the back have 5" pockets for the bangers. The owners had 7 tables reclothed with Simonis, but kept the 5 year old Milliken cloth on the 3 back tables. Those 3 back tables go for $8/hour, while the 6 reclothed 4.5" tables rent for $10/hour. The table with 4" pockets that was rebuilt by Glen isn't available for rent by most people. It stays covered with a reserved sign on it until a serious player wants to play on it.
I don't own the place or make the rules. If I did, it would be a lot different. Unfortunately the owners of this room know nothing about pool whatsoever, and have no interest in trying to learn. They run the business as a bar and music venue, that just happens to have 10 professional quality pool tables in it. They have live concerts several times a week. They have live jazz every Thursday during pool league. It's a shame.
Hmmm, Diamond pool tables AND live jazz on league night? Where do I sign up? If you want to know what sad is, come to my area and I will show you what passes as our city's pool room.