Hi Carl,
I went to see Orquesta Montpelier at Lydney Town Hall back in September 2007 and they were great!
I think the band is based in Bristol, if you contact Louise Forster by clicking on this link to her website www.latinsource.co.uk/ she has links with the band.
Her website also features some video footage of the band and her dancing on stage.
Hope this helps, and you are able to book one of these bands to come and perform live in South Wales, as it’s not very often that we are treated to the luxury of dancing in front of a live band!