If these are company sponsored events then yes it could be seen as a problem, especially if there is no diversity - going for a soccer game once it's perfectly

If these are company sponsored events then yes it could be seen as a problem, especially if there is no diversity - going for a soccer game once it's perfectly fine, if the following event is a trivia night or attending stand up comedy or something like that. If it's informal gatherings I don't see any problem, people are free to do what they want after work, including with people they work with if they share the same interests. From the original post I understood the latter that's why I was surprised by your comment because such informal events are pretty common based on my experience.