University of the Third Age U3A

"U3As are self-help, self-managed lifelong learning co-operatives for older people no longer in full time work, providing opportunities for their members to share learning experiences in a wide range of interest groups and to pursue learning not for qualifications, but for fun."

says their web site - and it's true. I have recently joined my local group for more just google U3A Spain, groups all along the coast.