On North Shadeland

I never took Karate when I was young, but many of my classmates in school attended classes here. I can't completely remember if this building was something else at one time....While I'm reminiscing about childhood memories, I wonder if the not too far away Rollercave at 21st and Post is still there? I used to attend school rollerskating parties there and would always be limping into school the next day with a black and blue buttocks...