Well, I had a virtual lemonade stand. Does that count? A few summers in the mid 80's, I took a computer class during summer school. We would sometimes get to play a lemonade stand simulation "game" in between boring typing lessons and the learning of other computer skills. I can't remember if it was on the Commodore64 or the Apple II (The pre-Macintosh Apples eventually replaced the Commodore64's at my school).
I fondly remember the game, though. Essentially, there would be a weather forecast for the week (or next day?) and you would pick how much supplies you would purchase (lemons, sugar, cups, etc). If the weather ended up being sunny and warm, you would sell more lemonade. If it was rainy or cooler, you would sell less. The better you could estimate lemonade demand due to the weather forecast and purchased supplies accordingly, the more profit you would make. I think you could also make the lemonade sweeter or more tart...but don't fully remember that. Anyhow, I was pretty good at the game and made a great bit of virtual money.