FYI:
I've seen in the past year that "Timezone" (forest hill/shopping centre) has 2-3 pinnies in it, i'm not sure if all Timezones are the same as this, but maybe there's some interest coming back into these places?
Maybe too many old guys ask the front desk "hey, where's the pinnies gone?" and it's enough to prompt management to re-install some pins now.

Timezone don't use coins anymore, you buy a cash-card (like a credit card) at the counter, and swipe it on the machine to begin the game (and deduct credit off your card).
The card swipe units are installed on the front of the coindoors, i guess the wiring runs thru the old coinslot to get into the credit switch contacts...
When you card runs out, just goto the counter and add some more cash onto it.....you can keep the card (if it's not empty) or just return the empty at the counter as they're not linked to your personal details or name etc etc...

Worth a look..

MM