To each his/her own, but my personal preference is dual sided MTB pedals with SPD multi-release cleats. It might not be fashionable with the roadie crowd but it suits me just fine. I go on quite a few group and other organized rides and can't see any disadvantage over the road pedals and cleats. I'm sure for racing or hard-core A rides it make some difference but not enough that a recreational rider would ever notice. I do a lot of long rides with stops along the way so a walkable shoe is a big benefit.