You get a bit closer to the malt shop to double-check. Of course, the whole search for a group of girls assumes they haven't gone their separate ways now that the fight is over. It is typical, though, in magical girl anime for the team to hang out together even when they're not in their magical-girl forms. Though, one thing that never made sense to you is how in anime that ordinary girls are unrecognizable when they're in their magical girl form. If the only apparent change is the clothing, then.... shouldn't anyone be able to recognize them?