Yeah, if you put $100 on your card for example, you actually get $200 on it. And after you've done that, you can come in the next day, next month, whenever - you still have $200 on it! All you have to do is go is put money on it that day!
I do have 'open day' sometimes at my place where people I know just come over and play lots of Pop'n, or whatever else (I also have the old beatmania cabinet, as I said, and I have two IIDX Arcade Style Controllers) - the only catch is no DDR, as I live in a wooden house it'd just break the house

of course if people want to play it on controllers, that's fine, or if someone brings a mat and wants to play it outdoors somehow, I won't stop them! Haven't planned any more of these open days yet though.
(for anyone's info, my beatmania cabinet is one of the 'mini' ones, and I have quite a few upgrades for my cabinet: 2nd, 3rd, 4th, 5th MIX; THE FINAL; ClubMIX; Complete MIX 1 and 2; and hiphopmania COMPLETE MIX 2 (the US version) - think that's it. 1st, 6th, 7th and Core are even rarer than the ones I have!)
I might not be in tomorrow - is anyone else going to be in? I was just going to go for a drive, take photographs in a few places. Mt Coot-tha is one place (want to test out my 500mm lens), so I have to go through the city - so I may stop by. But if people want to do something more social, just let me know - this is a "I have nothing better to do" plan.