I had my phone fell from my pocket while in a dancing club at night. Someone found it, took it to the bartender and I got it back (saw the location on my computer using Google's find your phone).

But would I deliberately leave my phone or laptop unattended on the table at a random coffee shop that I know nothing about? Probably fine but not taking that risk. Also as others pointed out, context matters. A small indoor coffee shop while I visit the toilet? No problem. Large crowded outside terrace? I'm not stupid.