Changing your pedals to anything else will only work if the new ones have the same threading. Can get tricky if you have French/British bikes. A better option for you if all you want to do is dump the clips is to get half clips. Avoid the plastic ones and find some metal.... Velo Orangs has some. No fear with halfclips, your feet will come out when needed. If you want to change the pedals minus the clips, get some platform ones. Many of them are made to be used with street shoes and give you good grip.
3SS