I'm a male in my mid 20s. Over the past year, I've started working out to try and get in better shape (I've always been overweight), and discovered that I love group exercise classes. I've found several great instructors in my area (it's a college town) whose classes I attend regularly.
The only problem I've run into is that most of the attendees--and instructors for that matter--tend to be women around my age. I'm not particularly interested in romance at this time, and I'm certainly not looking to hit on or flirt with any of these people. But I do want to be friendly (it's a group class after all) and not come off as the "creepy guy standing in the back every class".
Even on a good day, I'm not the best with social interactions. What can I do to avoid giving off a creepy vibe during these classes?