Photo by John Sonderman.

By DCist contributor Melinda Contreras

KARAOKE: District Karaoke, the team-based karaoke league, hosts its citywide finals. Eight teams (five division champions and three wild card teams) will compete for the chance to be named citywide champions. Expect singing to be accompanied by crazy costumes and dance routines. Penn Social (801 E Street NW) 7 p.m.

BASEBALL: Smithsonian Associates presents “The Most Powerful Man in Baseball? An Evening with Superagent Scott Boras.” Former Washington Senators stadium announcer Phil Hochberg will lead a panel with Washington Nationals TV and radio host Phil Wood, Adam Kilgore of the Washington Post and Scott Boras, the only agent to negotiate three $200 million contracts. National Museum of Natural History Baird Auditorium (10th & Constitution Ave, NW) 6:45-8:45 p.m. $35-45

COLIN POWELL: Frank Sesno, director of the School of Media and Public Affairs at GW, interviews Colin Powell, whose book, It Worked for Me: In Life and Leadership, will be available for sale and signing. George Washington University Lisner Auditorium (730 21st Street NW) 7-8:30 p.m. $34-45

Also this week…

TUESDAY: Capital City Showcase roasts LivingSocial, with comedian Greg Roth playing that part. The Brixton (901 U Street NW) 8-10 p.m. Free, but donations welcome.

WEDNESDAY: This one is for all the gents. Well actually, all the guys that aren’t gentleman, because this event will teach you how to become one. In this first event of the “Gentleman Clinic” series, learn how to get through a big date as UrbanStems, State of Affairs and VinoLovers share tips on choosing flowers, clothing, and wine for the big night. Wine and whiskey tastings included. Ladies welcome. UberOffices Dupont (1200 18th Street NW, 7th Floor) 6:30-9:00 p.m. $5

THURSDAY: This month’s “Phillips After 5” will includes food trucks, bourbon, a scavenger hunt, Bluegrass, and of course, art. The Phillips Collection (1600 21st Street NW) 5-8:30 p.m. $12