Ahh, 20-20 hindsight. Writers, of course, plan a season, and know what they’re doing.
In Hobo Code, when everyone is out partying and doing the Twist, there is a teeny quick shot of Harry asking Hildy to dance, and a few moments later you see them Twisting up a storm with each other.
(It also happens to be a bad continuity snag. Harry had, seconds earlier, walked away from Pete with two glasses, heading for refills. I mean it’s possible that he could have put them down because he wanted to dance, but the timing was tight, and really is unlikely.)
Oh, those crazy kids.