Not exactly on topic of overheard at work, but still hilarious nonetheless (and I couldn't find another topic to fit this in), I was called by CIBC (my bank), offering me Imperial Service. I didn't apply to it, but apparently it's a service where they assign to me a Financial Advisor supposedly to help me prepare for my financial goals (but in reality, it's more to sell me CIBC products).
Even though I don't really want it, I'm terrible at saying "No" and since its a free service anyways, I just went ahead with our introductory phone call. We were discussing retirement when he said "With my help you can retire comfortably by 65. And some people want to retire early - even as early as 55 or 60!".
Good thing I was on the phone and not meeting him in person, as I couldn't stop laughing.
I didn't tell him my FIRE plans (plus I'm much more interested in FI than RE anyways). But the crazy thing is he knew my income (since my pay deposits to the bank), he knew my spending was about $700/month, and he knew I was investing like crazy. But still earliest I could retire (with his help too, mind you!) was at 55!