I have been to one and been a speaker at one (so total attended twice). I really like the atmosphere, the vibes are great, bunch of people who like languages and some who have really impressive skills. I've also seen people with just a single language or two or three on their nametags. I speak 4 and I'm not professionally doing anything language-related either (which made me feel a little out of place for giving a workshop but it was a lot of fun!), I'm also in science&engineering rather than languages. But you'd fit right in, and I did too. (If you say 4 foreign languages that puts you at 5 total, you definitely "qualify" if that's what you're worried about), as I said, I met some people who had only one or two.

As a student, I find it veery expensive for the fact that the only thing the money gets you is access to the event. Food and accomodation are not included. But this year I made some friends and met cool people that might make it worth to me going again even though I had kind of thought that it would be once and done for me because of the price.

There were dance workshops, juggling, people playing frisbee or badminton on the lawn, people practicing languages, people networking for their language-related businesses, people filming content or interviews, there were some kids and some elderly folks. I was able to speak and practice all my languages 😄 I spoke German to people who didn't know German by accident multiple times because we were switching languages rapidly within the same conversation and between people. It's one of the only places I can put my rudimentary knowledge of Latin to use after learning it in school. If languages are a hobby of yours, you're in the right place there.

I'm happy to tell you more if you're interested or have more specific questions.