I have yet to find a local CVS, Walgreens, WalMart... et al, that will develop normal Black and White film, so I'm guessing they only have C41 and everything will be fine.
I dropped off a roll of standard B&W, asking if they developed it, and they said yes. They dropped it in their C41 tank, because that's all they develop there, then called me and said the roll came out blank. They don't even know what standard B&W is.