Can anyone join a rally?

Hello there, I was wondering if I could get some clarification on the topic of rallies. Specifically, I'm curious to know if the invitation to participate in a rally is open to everyone, regardless of their background or affiliation? Is it a space that welcomes diversity and inclusivity, or are there certain requirements or restrictions in place that limit who can join in? I'm eager to learn more about the accessibility and inclusiveness of rally events, and how they might foster a sense of community and unity among those who attend.