During the greater part of my working life, I worked in the DC area. The last 10 years or so, my office building was a couple of blocks off the DC mall and I would see Christian groups set up stages or tents of various types and offer Gospel presentations. I can personally report that just their presence sparked fruitful conversations with unbelievers.
Was a great week and weekend. 10's of thousands of peeps showed up for a huge revival. pastor D R , greg Lock, franklin graham, the my pillow guy among others preached and shared the park and brought a ton of peeps to Jesus. I had God bumps!