The main category for crew theme nights is based on vehicle class - supercars, lowriders, off-road, the list above, etc...let's brainstorm more ideas for other categories too, ones that can be supported by a location on the map, or a style of custom job for our talented job builders, and can be supported by the clothing/weapon options in-game.
Examples/suggestions, including past theme nights and DLCs:
Olympics/rep your country, blue collar, FIB agent, cops vs. robbers or agents vs. gangs, military, Flight School, Beach Bum, VIP/Bodyguards, long-haul truckers, melee only, Yacht Fight Club, Come Sail Away, Repo Men, mountain hiking, tourist trappers, etc etc etc...