I run a nearly 100-year-old New Jersey diner. I'll never serve avocados on my menu.

Carla Mende/David Degner/Business Insider

This as-told-to essay is based on a conversation with Jim Greberis, who runs and co-owns Summit Diner with his wife, Michele. Summit began serving customers in the late 1920s and moved to its current location in 1939. It's one of New Jersey's oldest diners. This essay has been edited for length and clarity.