I had an interesting experience the other day. This might be something very specific to me because of my spiritual beliefs. But I practice sort of energized meditations with chakras and the like. I associate the 'vibe' of people with this as well, energy/chakra balances throughout the body. And consider the draining aspect to be an issue of essentially the person holding such a chaotic energy balance in their body, that just by the nature energetic interactions, sucks out all structured balanced energy from it's surroundings. like positive to negative polarities almost.
But anyways, the other thing I notice is not only are people imbued with this vibe, but buildings are, everything is. Now one of my friends, who typically I quite literally have to sleep or mope around for hours the following day after visiting him, I managed to turn this around entirely. We were going to hang out, and I got to his house before he got back from somewhere, so I was there alone. I took this free time to basically meditate in the center of his house to change the energetic vibe of it. Which I did, by the time I was done it felt like a completely different house to me. And my friend came back and we actually had a really good rewarding conversation for like a few hours and I actually left there feeling refreshed. This was like nearly a 180 flip than typical times I go over there...