If you are going to moor it might be polite to moor and leave no space between you and the next boat, therefore eliminating those annoying spaces between boats or at least double up on rings/bollards . These boats seem to have the right answer. The other guy on the ring wont mind and if he does, tough! I have moored in a number of places where if this was the norm an extra two or three boats could have easily fitted in.
Leaving 10 to 20 feet between boats is inconsiderate and selfish. Why is that space so necessary?
Of course if you really want to moor with a large space between you and the next boat you could try the North Sea.