PIE IN THE SKY
If you think you are going to get rooms to put in
5 x 10 tables that will get used a couple times a year.
1) They don't have the room, and the room they have
they want 41/2 x 9 tables or even smaller.
2) They aren't going to spend the money.
3) They don't want a table (especially one that big)
that is going to sit around and not be used.
BOTTOM LINE
Why don't you just come out and say you are just trying to
push Diamond 5 x 10 tables, as you really haven't given any
and there really isn't any, good reason to use them.
Not to mention there are good reasons why 41/2 x 9 should be used.
Let me ask you something, would you say it's a safe bet that there is more than 128 pool rooms around the world with more than 16 9ft tables in them?