Pennys, no. Nickels and up, yes. However the last coin I actually picked up was a dollar. I've been carrying it around for three months unused since my bank won't take deposits of loose coins, and if I buy with my credit card instead of cash I can get 1 or 2% back, so I just can't bring myself to pay cash.
Eventually I'll go to a cash only business and be able to justify spending it, but I may have wasted more time putting in my pocket every day and taking it out every night than it was worth.