Paying businesses you can use EFTPOS which I believe is run by the central bank and has very low fees on debit cards, or the usual credit card networks/Apple Pay/gpay.
I do tend to shop at low-margin places like WinCo Foods. There's also an auction house I buy big ticket items from. Both charge credit card fees. I've never seen a gas station anywhere in the US not charge extra for credit cards, and most also charge extra for debit cards. The DMV also charges a fee. I don't know if Grocery Outlet charges a fee, but I do shop there too.
Also, pretty much every recurring charge I have, e.g. from T-Mobile, Comcast, and my water supplier and mortgage processor all charge credit card fees, if I use a card instead of ACH transfers.
There is a local supermarket chain that doesn't accept credit cards at all because they'd have to raise their cash price.
Everyone pays for credit card fees. Not just the people using CCs. Then CC companies pocket those crazy high fees while giving a lil bit back as "rewards".
This is a good example of a system we've normalized in this country which harms most people.