It's always baffled me why people say things like "knows how to have fun" and "likes to have fun". Fun is so subjective.
I don't like those descriptors, because they sound too keen. But it just means they're not going to be all grim when they meet you.
I've had that happen to me before, on a date. The girl basically just frowned and acted sullen the whole time. Sometimes major extroverts can make me feel uncomfortable, and introverted. But at the same time, it's a drag if someone acts like they're having the worst time of their life before anything even happens.