Do you give the "suggested donation" to museums?
Some museums are free, but have a box near the door for a "suggested donation", in lieu of an admission price. Do you give the suggested donation? Do you give nothing (since it's technically free)? Or, do you go through, then give a donation based on your experience?
Personally, I go through then give a donation as I leave, based on my experience. But, curious what others do.