Work Group Chat

Okay I want to know what you all think.

One of my coworkers started a group chat on Snapchat called “Athena Crew” (the movie theater we work at is called Athena Grand). So to me, that means all employees should be welcome. So after being added, I noticed a girl was missing so I added her; assuming the guy who made it didn’t have her because she’s kind of new. I went into work a few days later and my manager came up to me (mind you, this woman is 35 years old) very annoyed. She said “I need to speak with you.” And I said okay and followed her to the office.

She’s also a friend of mine, we’re all friends. We hangout outside of work a lot. We’re all potheads and smoke together outside of work. Some employees don’t smoke, but they know a lot of us do. No one cares. The owner even knows, he doesn’t care as long as we’re not smoking at work.

So we get to the office and she says “do you know what this is about?” And I said no, I honestly had no idea. She said “Another manager and I agree that we’re not thrilled that you added [new girl] to the group chat” and I asked why. She literally said that she didn’t feel comfortable talking about weed or sending pics or videos of it (a couple of us took “hits together” by all videoing us taking a hit and sending it) with this girl in the chat. The girl I added also smokes and participated in the video, and so did the other manager she claimed was also upset with me. I explained that I added her because she’s an employee and I didn’t see the problem. There’s non smokers in the group chat who still participate in conversation.

She ended it with “it’s whatever, I just thought it would be fun but now I won’t participate”

And then let me go. I feel like it was completely inappropriate. She treated my like her employee when the conversation was more between friends than coworkers. I just wanted to know if you guys agree with her or me? Am I wrong and just don’t see it?