Can a group of 4 or 5 individuals file as a group in small claims court?

We all donated money to a go fund me site ran by one individual. She is now refusing to refund our donation minus the processing fees by the site. The site has been contacted and they do not get involved in disputes; however, they are investigating the campaign. She used the money for supplies and whatever and did not keep receipts. She spent all the money ($1,000.00) without permission, asking, mentioning or even indicating that she was going to do that. What can we do. We all live in Michigan, Oakland County.