No offense but frankly ignore them. They are either BSing (aka, being brownnoses trying to look like "team players") or possibly don't have lives outside work.

If someone is that eager to have an event outside work, then you should ask yourself why haven't they organized one themselves? Either it is option A (they are just brownnosing and saying what they think you want to hear) or B, 80% of people don't actually want to go out to events and it is really just a loud minority saying it and the others are just agreeing to sound good.

Chances are, you haven't actually asked 80% of your employees. Most likely you heard it second hand from a manager pushing this idea (again, brownnosing or looking for promotion) or you heard it in a group setting where people don't want to be seen as not "team players" and don't say there actual opinion on it.

If you change your policy, don't be shocked if a lot of people start leaving the company for some "unexplained" reason.