Use 'jokey' when you're in a casual setting or the situation is light-hearted, not in formal or serious contexts. At the family reunion, his jokey remarks made everyone laugh.
Pro Tip 2/3
Not Always Funny
'Jokey' can be used even if the humor fails; the intent to be playful is enough. His jokey attempt to cheer her up fell flat, but she appreciated the effort.
Pro Tip 3/3
Friendliness Indicator
A 'jokey' demeanor often suggests that a person is friendly and approachable. The new teacher's jokey personality made the students instantly like him.