I own my home and have a washer and dryer. I still occasionally use a laundromat because they have huge over-size washers. The last time I used it was when a cat had digestive issues on a couple of bed pillows. Before that was when a different cat managed to foul the 53" (1.3 meter) diameter dog bed. I've seen other people in there washing sleeping bags.
They also have standard-size washers which a home owner might use while their washer is broken or if there is an extended power failure.
I'm surprised no one here has mentioned the "Wash Pub". There's one in Omaha and I think in other US cities. Its exactly what it sounds like - a bar connected to a laundromat. You can have a sandwich and drink a few beers while doing your laundry. I've never been in one but the one here looks nice from the outside.
Yes, there's one down the hill that I've used when my home machine is broken, or a couple of times when various medical incidents required that *all* the bedding be washed *now*.
Some of my friends with larger, sporty kids will use the big machines for occasional cleanings of whatever underlayments the kids wear all season. (Hockey pads? I think?) But I'd never shlep my stuff down there regularly, by choice.