Yeah sounds weird. I have two people at work who are my friends outside of work so they know my hobbies. I don’t like to share my hobbies with others because I’ve been asked (many times) to make stuff for free or low pay or sell it to them-no way, not making or selling stuff for colleagues. My hobbies involve making something quite tangible. I prefer to keep it private. Wonder what they were laughing at you about. Like what hobbies could be possibly funny? Playing clown at children’s parties? Gee.