I would guess that it would help you if you wrote it down as well, instead of just QR code. I get that "pay with crypto anywhere" is a good one, but under the QR code you should write "btc address" or something like that to make it clearer.
When it comes to cards and poster means of publishing an address, the QR code always goes. Yeah, it might look as though you having all public informations spelt out in the various forms they could represented or presented is the best form of idea but, your going to put your customers at risk of a wrong address or time wasting in getting to type the Alphanumeric nature of the address just right.
One little mistake and you might end up sending the coin to either a wrong address or you would have come up with a non exiting address and the transaction fails to go through.
Here, you get to waste a lot of time, trying to be accurate, doing it wrong and trying again.
When it comes to QR codes, you just get to scan and the accuracy isn't in doubt. You input other details like amount and fees then send and its gone.
It's great news your utilising the knowledge you've acquired and in turn, preaching btc in your little way. I encourage that.