NANS, ASPN, PSPS, and Napa Pain are where the cool kids go. Attending these events is akin to having a spiritual transformation. You will walk away realizing all that is possible and myriad of ways pain doctors can change the game for their patients. Attendees and speakers are dressed to impress. Social interaction, hallways chatter, networking, etc are prime. It's KOL kindergarten. Dreams and careers are made and broken at these venues.
SIS, ASIPP, and AAPM are where the nerds go. Nerds. The speakers look like they bought their suits on sale at Target. Half the attendees wandering around the exhibits have their zippers down. Rooms filled with aging, balding doctors who look like they need to get to the gym more. You might pick up some good science, but not any good stock tips, real estate deals, or surgery center/tox lab/ DME joint venture opportunities.