Hello @Erin-p
This is not perfect, but it is a workaround for your problem. If you select 'Workout' as a shortcut on your tracker and Start and Stop it on there, it will measure your calories and heart rate etc. After you've finished, you can go into the App on your phone, select the Exercise you just did, then Categorize Exercise and you can choose from a dropdown menu that includes, Zumba, Barre and Barre Class.
It also might be worth making a Feature Suggestion if it hasn't already been suggested.
I hope that helps a bit.