Here in Ireland, in my local supermarket, there are marks on the floor for maintaining social distancing in the queue. In a local off license, there can be only one customer in the shop at a time. The establishments can also enforce a bit these small things. It makes things a bit easier as well. A good will from everyone is also welcome.
Here, supermarkets do not allow couples or groups to enter.
They also keep a count of how many are in-store and, once the limit is reached, people have to queue outside the store, waiting to be let in once someone leaves.
Banks only allow one customer at a time to be inside.
Wipes and sanitiser are supplied free from dispensers just inside the premises. Bins are everywhere.
The same where I am located
Some supermarkets in my area won't let you inside without a face mask and they've already installed Plexiglas at the cashiers also...