Public reflection type:
Public apology karaoke:
I also encountered this artwork called blind field shuffle which i would put in this category.
Prompting others to act type:
The art and social practices workbook:
Environmental activist type:
Not too sure whether this is social practice art cus there is not much social engagement in this art piece.
In general a lot of social practice art is just providing a platform and opportunity or inspiration for others to act and get involved instead of doing the actual artwork themselves.