Try Alan at Bar Catorce. It is a classroom environment however, is so well structured that distraction from others doesn't seem to happen. Very good interaction between "pupils", well thought out lessons with a homework sheet every week, and for the first 50 lessons a sheet each week of information about Spanish culture, history and places of interest.
A new class, I believe, is starting next Wednesday at 12.30, 5€. There were some places available last week for this new class but I do not know if they have been taken.
Email address:
[email protected] This is half term week and Alan is away until the weekend, so if you do email don't panic if you do not get a reply straight away. Good Luck