Recently, a foraging friend online, Peter Gussie, experimented with using Honey Locust pod seeds as a form of coffee bean. He graciously allowed me to share his experience.
He collected a grocery store bag's worth of Honey Locust pods which produced about 3/4 cup of seeds.
He roasted them in a cast iron skillet for 15 minutes.
The "beans" were not uniform in size so some cooked darker than others.
The final brewed batch tasted more like Earl Grey tea than coffee, but good, nonetheless. You can definitely pick up a little sweetness from the beans.