HC/DIY exists, sorta FAG COP still lives there, go to the replay lounge, it's a pinball bar
Correction! FAG COP does not live there. But I used to live there. Nice place to visit.
As far as I know, not a lot of music stuff is happening at the moment. But I'm out of the loop. Haven't seen any hardcore in Lawrence since GWB's administration. KCMO has more hardcore/DIY shit.
Replay Lounge is a solid bet, though it's gotten more bourgeois in recent years. Guitar player from Mouthbreathers/Blood on the Wall runs a killer taco stand there called TACO ZONE. Highly recommended.
Love Garden is essential. Keep your eyes peeled for Acid Rob and the Honk for Hemp guy.