Yes, that's a clue Ivan just provided. Next thing you know, Sam and Fi are staking out a Russian restaurant called Romanov's near a café and a deli. Sam gets a call from Harvey, wanting to meet with Sam again. "He is working you," Fi remarks at the end of the call. "I've gotten nuclear secrets out of KGB agents for less time and money," Sam agrees. Fi whips out a thermal camera, explaining to Sam that she swiped it from her neighbor's boat. "He's been using it to peek at me through the walls of my apartment, so I figure we're even." As we share Fi's point of view through the infrared camera, which shows red humanoid blobs moving around behind the walls, Michael explains in VO that this is a handy tool for scouting: it tells you where the warm bodies are, and which rooms are heat-shielded to hide said bodies. Which, as Fi reports to Sam, the top floor is.
So then Fi and Sam are inside the restaurant, sitting at a table and eating lunch like a couple of regular customers. The mafia boss, Takarov, is holding court at a table near the back, which is also near an elevator leading upstairs. Seeing the guard posted there, Fi and Sam decide to throw some shenanigans. As Fi gets up to ostensibly hit the bathroom (the entrance of which is next to the elevator door), Sam throws a noisy, food-spitting hissyfit, demanding to see the manager. That's all the diversion Fi needs to board the elevator upstairs. Poor Sam, always on diversion duty.
As Fi makes her way down a top-floor hallway, a MWVO laments how diversified organized crime has become these days. "The heat shielding you hope is hiding a human smuggling operation could be hiding radio emissions from software pirating computers." That would explain why, when Fi opens the door to a room expecting to find a bunch of kidnapped women, she instead sees one guy sitting next to a bank of computer towers. She makes a lame excuse and walks out, which I'm sure isn't something she would have been able to do if this had actually been Takarov's chick-bank. When she returns to the dining room, Sam is pinned against the bar in what I'd guess is some kind of Sambo hold, still making a ruckus. Fi pretends to come to the rescue: "Take your hands off my father! He has...dementia." Offended but playing along. Sam lets Fi lead him doddering out of the restaurant. "Daddy?" he asks Fi when they're clear. "Bet you never thought you'd hear me call you that," she says. I was wondering when she'd get tired of having to pretend she and Sam were a couple in situations like this. One day Sam will get his revenge, though: she'll be surrounded by thugs, and he'll walk up to them and bark, "Give me back my broom!"