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Youre welcome. You had the right idea of getting outlets close to the tables, but it does cause problems when pushing nightstands into the wall.

You could still utilize the oulets and get the nightstands close to the wall though. The best thing to do is use these (sorry for long link... I forgot how to shorten it with linked text):

https://www.amazon.com/dp/B000KKLMKW/ref=asc_df_B000KKLMKW5075252/?tag=hyprod-20&creative=394997&creativeASIN=B000KKLMKW&linkCode=df0&hvadid=167139094796&hvpos=1o2&hvnetw=g&hvrand=7075833547891463428&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9031539&hvtargid=pla-500526559152

The above plug will allow you to get the nightstands closer to the wall. It's not perfect, but better than a regular plug.

The other thing you can do is cut a hole in the back of the nightstand where the plug is protruding. This is actually the best way to get the nightstand the closest to the wall possible. The only thing you have to make sure of is that the plugs would not interfere with drawers in the nightstand, or that they would not be badly visible from the front if the nightstand has an opening where the plug will protrude through it.

Do you have a quick charge capable pad?

https://www.amazon.com/Samsung-Wireless-Charging-Enabled-Devices/dp/B012AWBN9C

Edit:More https://www.gottabemobile.com/galaxy-s7-fast-wireless-charging-what-to-know/

They could grab an extra charging cradle and then they could put that phone plus the extra one it comes with, anywhere they like.

https://www.amazon.com/VTech-CS6609-Accessory-Handset-CS6619/dp/B007P8DKPW/ref=sr_1_1?keywords=vrtech+charging+cradle&qid=1565020108&s=gateway&sr=8-1

Edit: realized this link is for an extra wireless phone, not just the cradle. It's probably possible to find just a cradle.

Looks like it's basically this product.

It's called a clock box, the outlet is slightly recessed so the clock can lay flat against the wall and still be plug in.
Edit:
Does it look like this?
https://www.amazon.com/Leviton-688-W-Recessed-Receptacle-Residential/dp/B000U3BVRS
Edit 2: the little metal piece is so the clock has something to hang on.

Yep.

https://www.amazon.com/dp/B008I5SHF4

You can do a simple test using a GFCI Tester

The fact you or anyone else do it constantly and don't catch shit from it doesn't mean it's not a code violation. Routing a flexible cord through a hole in a suspended ceiling or wall is a violation of 400.8, no matter how far into the concealed location it goes or where the cord goes after it gets in there (except for certain listed assemblies designed specifically for that purpose, which the OP's photo is not).

Your local fire marshal/AHJ might be laid back enough to not comment, or he might have better things to do. The probability that this sort of thing by itself leads to a fire is honestly probably not all that great, but if you ever did have a fire in that area and a forensic investigator found something like this it could land you in a world of shit with your insurance company, among other things.

Source: I'm an EE working in the building design industry, and I make my living designing things to meet code.

Edit to add: If you're only temporarily plugging in up there and removing it when it's not in use, you're arguably meeting the spirit of the code. The intent of this provision is to prevent people from leaving an energized cord in a concealed place for long enough that dry rot, animals, vibration against a sharp edge, or a careless worker pinching or mangling the thing could cause the insulation to be compromised.