I have heard that my state school likes to see a letter of recc from each of your three "significant" experiences from your AMCAS activities. One of those for me is working with an activist street medic collective that provided first aid support at demonstrations. I am probably going to polish the language to sound less political. But that aside, I did some great work and collaboratively designed & taught a 20-hour first aid curriculum to community activists & organizers several times, and I think it makes for a great leadership experience.
But for the letter, this basically amounts to asking one of my friends for a letter of recc. Is that frowned on?