Or not necessarily how many but can you name or list some? Qmasters in virginia beach is one with roughly a dozen of each but it's the only one I know of.
Shooters in olathe kansas don't have enough diamonds to hold a tourney but they have 4 seven footers amd 4 nine footers that are diamond.
41 tables in all I think.
10 minutes from my house is Sharpshooters in Amsterdam, NY. They have 8 - 9' Diamonds and 6 - 7' Diamonds. All in excellent playing condition. They hold a couple legs of the Joss tour there. Beautiful little pool room for such a tiny city.
Gotham City Billiards in Brooklyn, near Coney Island. 16 9' Diamond Pro-am's and 1 10'. all except 2 9-footers have I think 4 1/2" pockets, the other 2 have 4 1/4" pockets.