Bad idea.. Unless its prearranged thing at a show/expo/pet store. There are far too many people out there with a fear of snakes who would love to just call the cops on you.

I take mine into the yard occasionally (back yard) in the summer but my neighbors are all snake tolerant with me. I'm actually worried that one of the houses next door is in foreclosure. I will be talking to any agents I see there about telling any new prospects looking to buy that I have reptiles, and myself and neighbors all have barking dogs. There are about 7-8 dogs on my block alone.

I'd never risk the problems that can come about by taking my snake off my property unless its to a vet.

I did however, take my bearded dragon to a friends house once. He was harnessed and sat on my shoulder for the ride. They are a little less intimidating but I still wouldn't take him into any business. If people can't legally take other pets into most stores or restaurants unless its an actual service animal, what makes reptiles the exception??