Everyone of us could tell you what we have hooked up to one receptacle, but it's worthless data and should under no circumstances be a deciding factor on your part.
You need to do some sleuthing and use that data to do some math. Turn everything on, and then shut off the breaker, find out every last piece of electrical equipment that runs on that breaker and add up all the current draw. Most items will have either current or power listed, to convert power to current divide it by 120.
For example, your living room has two lamps with 100W bulbs, so that's 200/120=1.7A, a phone charger which is .2A, a TV which draws about 2A, an entertainment system that draws 8A and possibly an iron or vacuum which cold draw anywhere from 10-15A.
So adding it all up nets roughly 20A, so adding anymore power hungry devices on that circuit isn't really a good idea.