You can definitely make ginger beer with wild yeast (fresh ginger root conveniently comes with lots of wild yeasts) and make delicious drinks. There are lots of recipes.
I also recommend, if anyone is interested, investigating “ginger beer plant” (GBP), which is a symbiotic culture of bacteria and yeasts (SCOBY) such as that used to brew kombucha and kefir. It was once common in Britain, but almost went extinct. Some was saved by a German culture bank (DSMZ), and now you can buy some online! Makes a different, and I think delicious, drink compared to the “ginger bug” method!
I also recommend, if anyone is interested, investigating “ginger beer plant” (GBP), which is a symbiotic culture of bacteria and yeasts (SCOBY) such as that used to brew kombucha and kefir. It was once common in Britain, but almost went extinct. Some was saved by a German culture bank (DSMZ), and now you can buy some online! Makes a different, and I think delicious, drink compared to the “ginger bug” method!