Can I also use Momoyoga for other disciplines, like for example a dance studio?

You can basically use Momoyoga for all kinds of group classes. The admin or teacher will keep seeing terms such as yogis (members), but a member will only see the word yoga again in the URL of the class schedule (e.g. momoyoga.com/yourstudioname). For your classes, memberships, and class passes you can use completely customized names.