I have clipless pedals, not Frogs, but I probably only clip in like 50-75% of the time as I am still not 100% comfortable with always being clipped in. It's probably easier in some pedals than others to ride without actually clipping in. Someone with more experience than me with Frogs might be able to tell you how possible this is. I have the Crank Brothers Candy C pedals. I also unclip my left foot at places where I know I am going to have to stop or where there is a lot of people that might constitute needing an unexpected stop. HTH!