External stimulation gives extroverts energy
Extroverts feel recharged during and after periods of significant social interaction. Time spent alone or in low-energy activities can feel draining, not to mention boring. They thrive in company, especially if it is in a high-energy environment. In fact, a day alone on the couch will almost always leave them feel more tired than when they started. In a party environment their energy is contagious and they love being at the centre of attention. After a long day; social interaction with friends or larger groups might be what they seek, rather than quiet time alone.