Thank you Hermit and Masaleh,
I always enjoy the Greenspeak articles and the Mixed Bag article gave me just the info I was looking for. I have contacted Cinta Bahasa and hope to start their beginner's course soon.
For anyone who is interested they are getting ready to start an evening course but I want to go during the day so I'll wait until there are enough people for a daytime course.
My Bali observations here - http://baliquest.wordpress.com/
Is the evening course at Cinta Bahasa 2 hours, five days a week?
Looking here should give you all the info you need. I haven't done their evening classes and don;t know the details.
My Bali observations here - http://baliquest.wordpress.com/