I have cups on many of my bikes, which are basically toe clips without the straps. Like John Nolan, my riding style is pretty casual. Cups give you a decent percentage of the efficiency of clips or clipless with much less constraint. Velo Orange normally carries an inexpensive cup that attaches like a clip, but they're out of stock right now. You can use a toe clip and just take the strap off, but they kind of look like you don't know what you're doing.