I've never been out that much because I rarely get invited out. But I guess how much is too much is dependent on the individual. I tend to get exhausted pretty easily and need a few days recovery after travelling or a day/night out. If I don't get that rest time in between activities, I sink into depression or become really agitated. I would love if it weren't so, but because I know myself, I either try not to do more than 2 consecutive days of activity at a time or if I have to travel away from home for longer than that, I just prepare to crash and burn when it's over.