I've never tried street clothes with Aikido, but then I've only been doing it two months, I have practiced other MA's in street clothes and I found the hardest part was the foot work. Shoes do not slide or glide like your bare feet do, they tend to stick. It's very easy to stumble thinking that your feet will glide along, like they do in the Dojo, but they don't. I found the experience enlightening and humbling. I would recomend it to anyone.