I think, quite a few groomers have one day a week, when you can come in and use the tub and dryer and whatnot, for a smaller fee. But like someone else said, they also have it at the larger pet stores.
When I was still haviing a grooming shop, this was no problem at all, having all the equipments needed. Now I use either a full size tub in the kids bathroom, or the large walk in shower in my bathroom, I hook up a hose to the shower and go in with them (no point in even trying to stay dry when you dont have the "doggie meant" tubs) It works well, I put down a slip mat, so they dont slide around in there, and then I go to work. The two smaller ones I tend to bath in the tub, the larger ones goes in the shower, that was nothing has to be lifted lol.... they just walk right in, and they love it, a good idea with the big dogs, I think is to make them get used to bathtime from the start, that way it is way easier when they weigh 150 lbs.
Marit