Friday: Karaoke Killed the Cat. A karaoke dance party for people who never thought they’d like karaoke. Union Hall • 702 Union St. at Fifth Avenue http://karaokekilledthecat.com Midnight Free. Skate night: Raising money for breast cancer awareness. JM Community Center • 2335 Bergen Ave. between Avenue X and Avenue W. 6:30–9 pm $5 ($10 family). Another Skate night: Bring your own skates at the Brooklyn Lyceum • 227 Fourth Ave. at President Street http://www.brooklynlyceum.com 8 pm–midnight $5. Diabetes support group: run by a certified diabetes educator and open to individuals living with diabetes and diagnosed with pre-diabetes. Held in the hospital’s Wesley House 6A. 5–6 pm in Park Slope New York Methodist Hospital • 501 Sixth St. between Seventh and Eighth Avenues http://www.nym.org 5–6 pm free.