Yes, and the standard space requirement for a soul motown band in Manchester is 3m x 3m. However, this measurement varies from supplier to supplier, depending on the band lineup. The space required will depend on the number of band members and their instruments.
You need to ensure that there is enough space between the band and your guests while ensuring that your guests get to enjoy a proper visual. You can discuss this with your preferred supplier on Poptop to know the right space suitable for their band.