The problem with the token operated machines, is that you often find that none of the marinas use the same tokens . . . and they generally have a minimum amount you can "purchase". So, they charge your $xx.xx for the card, usually $3 or $4, then have to "charge it" with a minimum, often $20.00, then use the $8 to do your laundry, so you have really paid $24 to do that laundry ($4 to charge, + $20 minimum). No problem, you can use it at the next marina, right? Wrong!
They use a DIFFERENT token system, so once again, $24 to do your laundry . . . At the end of a cruise, you have an extra $100 plus tied up in different tokens you can't use . . . but heh, you're doing that cruise again next year! You can use those loaded tokens in those same marinas! Problem solved . . . then you get there, and guess what? They've changed machines/token vendors/policies . . . so once again $26 for one load of laundry (because the price of the token went up $2 this year, they had to pay for the new machine somehow, you can expect them to eat the cost, can you?)
Enjoy!
By the way, the experience above is related from real life experience, just not with laundries at marinas, but with laundries at RV parks . . . Now we just have the laundry in our RV and forgo using laundromats. Same will go for our next boat to be . . . a washer is a MUST HAVE!