How many is "lots"? How introverted are they (on any scale)? How active are they within these circles, and how big are the circles?

My point is: intensity introversion introversion inherently limits the the size of any useful social circle by requiring excessive emotional energy to grow beyond that. For me, that size is probably on the order of a couple dozen people, though that's well beyond the comfortable level of emotional expenditure, which is closer to only one dozen.

Filtering by technical aptitude (notwithstanding a disproportionately high ratio) and startup compatibility, reduces the number to zero.