A high-end store might have a restaurant or coffee shop, intended more for socializing or small club meetings than dumping unruly children. In the 1950s it wouldn't have been unusual for there to be some sort of child care in the store, as a courtesy to shoppers.
Some stores had fairly dramatic internal architecture designed to impress their customers, unlike the usual "boxy building with stuff in it" of today.
"High end" generally meant "established." That would have meant downtown instead of in the suburbs. In most places downtown was where the good stuff was. Suburban stores might carry the same stuff, but they were nouveau upstarts.
The cosmetics or "women's wares" section would sometimes have a cosmetologist or even a salon.
There would have been one or more seamstresses to fit off-the-rack clothing to customers.
Departments were usually walled or roped off, each with its own manager and sales staff.
There were chain stores, but large and/or high end ones tended to be independent. Instead of getting their stuff from a central warehouse they dealt with multiple - as in dozens or hundreds - of salesmen from upstream retail vendors. This sometimes took multiple staff.
An upside of this was, if you didn't see exactly what you wanted, a salesman could dig out the applicable catalogs from those salesmen and put in a special order.
Some stores sold "on account", sending monthly invoices. Others had "charge plates", which operated about the same as modern store credit cards. Being able to buy on credit was a status indicator.
Lots of places back then still operated 9-to-5. Some of them would have been closed on Sundays, or severely restricted on what they could sell, due to "blue laws."