Filter bubbles happen in meatspace as well. In real life, they're almost inevitable because the people you see and listen to every day become your world. Since you're limited by proximity and geography in real life, it can be a pretty small circumference.
Taking a high-profile example, I felt like President Obama was relatable when he was first elected. The stories and anecdotes he told were stories of an average guy who was embarking on a big journey. As I watch the exit interviews with the President and his wife, they talk about friendships with Beyonce and Oprah and of their time sleeping in Buckingham Palace, it's hard to relate. Now Michelle's big wish is to open a window, something most people can't relate to.
It's inevitable though. As they interact with their circle of people who frequent the White House, they take on the values, problems and attitudes of people with whom they speak.
Online, it's a tiny bit different because the filter bubble is fueled by likes. I just watched a video about some guy describing how people change their lives so they can post pictures to Facebook and Instagram to gain likes. That becomes a self-perpetuating filter bubble, but one fueled by relative strangers.
Another video I found on Reddit about how social media is fueled by likes.
I don't have a Facebook, Instagram, Twitter or Snapchat account. I'm not conversant about how it works except by watching those videos.
I also think it depends on what kind of person you are. If you like to fit in, you'll more easily become a part of a filter bubble. That seems voluntary though.