at the weekends in street markets I use Canon Ps with 28, 35 and 50mm Canon lenses.
400 ISO /125 prefocused

28@ 5ft
35@ 7ft
50@10ft

instinctive point for the hangunners, from the hip for the rest of you

the P shutter is louder than a Leica's fabric but you have got the shot before they hear it