Jared had been complaining for months about how secretive Jensen was. Heck, Jared didn't even know what Jensen did for a living, just some mumbo jumbo about being a finance officer for a foreign exchange that required him to work nights. Jensen's friends remained a mystery as well. It wasn't that Jensen was unlikeable, well... maybe a bit grumpy when he first woke up, but Jared had just never seen him with anyone other than himself.
So when Jensen suggested that he and Jared go to a party his friends were throwing on Halloween Night, Jared was all in.