The flip side of that Sendaz is that even today we have high end exclusive shops that don't even let you in if your trying to come of the street you need a recommendation and an appointment to look at their wares. In which case the hours don't really matter.
Oookkkay, if you want to keep changing the goal posts I suppose...
or are they open 24/7 so at 3am on a cold christmas morning you can pop into a store and look for a new dress or a present for the aunt who showed up unexpectedly?
Didn't really mean 24 hour fast food was thinking more normal stores. Clothing, video store equivilants, electronics stores, trideo cinema's or whatever equivilants exist in the shadowrun world.
So you went from asking if there were shops open 24/7 for normal slobs (remember you originally referred to non-humans, nightshift folk like doctors/nurses and cops) where said folk can just pop into any old time for basics to you changing the goal post to hyperexclusive shops that require A) recommendation to even be seen and B) an appointment in advance which probably means their wares are not off the rack or common. Something like this is probably are NOT part of a national chain in itself though it might be a subsidiary of a corporate chain.
At that point you are comparing apples and oranges, because there will be such shops that cater exlusively to the Jetset megarich, but those will be few and far between, and that assumes you even know where to look for them since they likely do not advertise seeing as you have to be recommended to even be seen so why pay for an ad?
So if you want some one of a kind shop for your runner to drop in on, handwave it in and move on, but don't expect the majority of shops to run on that model.
Most shops have overhead and bean counting accountants to deal with, so they will focus their sale times to reap maximum sales for the workforce they have.
Plus as others have mentioned, with the ability to go online, a shop can have 1 or 2 bodies packing Matrix orders overnight for a drone dispatch straight to you, but will rarely keep the entire place open and fully staffed at the witching hour unless they cover a wide range of inventory so as to justify the night time presence like Kong-Mart can.
Edit: Now there will be regions where the reverse applies. When I was in Egypt many regular shops are shut during the day because a) most everyone is at work or sleeping cause so much work is at night, so there is nobody to go buying stuff and b) it's damn hot.
There are some shops covering the basics/essentials and of course things for the tourists like fast food and cheap knock-offs, but it's the nighttime when the locals are able to go out and shop that things come alive.
The outdoor market opens and shops for the locals open their shutters and it literally runs til near dawn before shutting down before it starts to heat up again.