My boss just pulled me aside to talk to me about "my behavior" because we bumped into each other at lunch and he saw me having a beer with my burger. I feel like having a beer at lunch is an incredibly normal thing to do. Obviously fuck my boss but am I wrong here?

Edit: I feel like I should specify in hindsight that I was off company property at a sports bar when I was getting lunch. I was not just sitting in the break room downing a cold one