I used to buy a coffee from time to time with bitcoin.
But I can't use bitcoin buying a coffee now, because the fee is so high, if I keep 0.0001 fee like before, it would take days for the transaction to get confirmed, I've got a transaction which took 11 days to get the 1st confirmation last month.
It's not cost-effective any more to buy (I mean both online and buying face to face) thing via bitcoin. And this is why I quit buy coffee with bitcoin.
Well that is true given the current miner fees today it is likely that we will stick to fiat currency in buying anything such as coffee from local shops and merchants due to a very high fees which will make your purchase more costly. This is one of the problem that the community is facing right now and we hope that when a code is accepted in mining the fees should also go down.