From GameWorks Locations - Seattle:

Pricing And Promotions
$1.00 activation fee charged on all new card purchases.

Standard Pricing:
$10 gets you $10 in gameplay
$20 gets you $25 in gameplay
$25 gets you $35 in gameplay BEST VALUE!

Sunrise Special:
First two hours each day $20
Moonlight Special:
Last two hours each day $15

Time Play:
Sunday - Thursday Only
1 hour of unlimited gameplay for $20
2 hours of unlimited gameplay for $25
3 hours of unlimited gamplay only $27!!

I like! I hope those promos are still on when Bill and James and I hit it up.