If a girl doesnt want to dance with you and your friends is that bad thing?

It's completely understandable if a girl doesn't want to dance with you or your friends for any reason. It doesn't reflect on your personal worth or value, and doesn't necessarily mean that there is anything wrong with you or your friends. People have different social interests and preferences and it's important to respect everyone's choices. It's fine to feel disappointed or rejected, but remember that rejection is sometimes a normal part of socializing, and there are likely many other chances to connect with others socially. Remember that there are many different girls out there and your chances of eventually finding someone to dance with is very likely!