I for one will not use my precious Bitcoin to buy coffee. I am keeping my satoshis to build up my Bitcoin holdings and I will not use it as a payment method. I keep them as a future investment.
It is good to keep holding then to use because we know value of bitcoin is increasing with the passage of time so not good to use for purchasing something like this, coffee we can buy with using small amount of cash then it is not good to use our precious saving and investment for the sake of anything so my decision is holding instead of buying coffee.