A few comments....
Notice Bill's Washette makes big noise about "individual washing".
This was a small laundromat promoting that their "fluff and fold" service did laundry orders individually in separate machines. Though common enough today back in the 1950's (when this picture was taken), 1940's and really since industrial laundries came upon the scene most all did loads in huge machines. Items were either marked or placed in nets in order to tell what belonged to who.
Many households felt this practice was unsanitary because you never know where other people's washing has been. Your bed linens could be in the same wash as the knocking shop across town. That and there was an incredible fear of disease, especially pre WWII before modern antibiotics came along.
Of course many modern large commercial laundries today still "mark and mix" laundry orders. Using several large machines is far more economical than having many smaller washers and dryers, but there you are then.
*Damp Wash*
Though rarely found today, but well into the 1950's you could still find laundries that offered "damp wash" service. Your order would be washed (by hand or machine), extracted, maybe starched if requested, extracted again then folded (damp) and returned. The household would take the damp linen and either dry it at home (hanging up usually) or more likely some or all the items would be ironed.
Damp wash service was a boon to households before washing machines (semi or fuly automatic) became more common. It relieved Madame or whoever from the burden and mess of washing laundry by hand or even with a wringer/semi automatic. Commercial washers or extractors left laundry far more dry than wringers, and did so more evenly so things were ready to iron. Only caveat being the household in question had to live rather close or pick-up their laundry quickly when done. Can you imagine leaving a damp bundle of wash sitting around for several hours? It certainly couldn't remain over night.
Today with modern fully automatic washers leaving things "damp dry" at end of cycle, the service is no longer truly necessary and has vanished. If you don't own a washing machine just go to a laundromat and take your washing home instead of using dryer after washing.
Cook Machinery Company made a variety of commercial washing machines, dryers, and other cleaning machines. WASHETTE, TUMBLETTE (dryers), COINETTE (coin operated meters for washers and dryers), and so forth.
*Bachelor Bundles*
Yes, some dry cleaners/laundries still offer that service.
http://www.oldetownecleaners.net/zanesville-oh-dry-cleaning-services?_rdr
Historically bachelor bundles were confined to men's shirts, undergarments, socks with the first washed, starched and ironed. Until a certain point in time you could add (detachable) collars or cuffs to that list.
Of course a gentleman could send whatever else he liked; bed, bath and table linen, pajamas, handkerchiefs, etc... but they might be priced differently though still part of the same "bundle".