Council libraries run a range of free workshops, classes, activities and events.  For example: book clubs, internet and computer classes, general interest groups

50 Plus Centres (eg. at Brisbane City Hall).   These provide a wide variety of low-cost activities from Tai Chi and Scrabble to Art Classes and Line Dancing.

Australian Mens Shed – this is a group of men that enjoy restoring furniture, fixing bicycles for schools, and making cubby houses for Camp Quality to raffle off. The idea is to use their skills for something meaningful, while enjoying a cuppa, a biscuit and a chat

Heart Foundation Walking group – these meet for a 30 minute weekly walk at locations across Australia.

Volunteer  – numerous interesting opportunities available at hospitals, not for profit community groups and retail outlets such as St Vincents etc.