I thought dryers, but I suspect driers is probably considered to be a reasonable alternative now.
Having them free is fairly sensible to discourage drying in rooms. Ours were 20p per 10 minutes. But you could put as many 20ps in as you thought it needed, but once it was dry you didn't get them refunded, and most people just stuck a load in, meaning that every now and then you got it for free as there was enough stocked up from other people.
Dd had a Roman Mystery costume which I'd made for Book Day so she wore that.