Tooth and nail — that’s how the five entrepreneurs go at it for the 16th annual Princeton Entrepreneurs Network business plan competition on Friday, June 1 at the Friend Center, part of the Princeton University reunion activities.

Ben Lerer — co-founder and CEO of the digital media firm  Thrillist.com, members-only shopping club JackThreads.com, and local experiences firm ThrillistRewards — will keynote at 10 a.m.

The lunch — with four additional speakers including Tom Szaky, founder of Terracycle — requires registration. The always exciting business plan pitches begin at 1:15 p.m., with 5 companies making 10 minute pitches followed by 25 minutes of grilling by the judges.

The business plan competition is planned as a reunions event but there’s generally room for observers. Just don’t try to stay for lunch unless you’re registered!

Lots of stuff is happening in the next week — mostly business/techie events, one for hard core dance aficionados:

The American Women in Science/NJ group has a meeting on mentoring tonight (Thursday) in Piscataway.

Princeton Ballet School presents its faculty and staff concert on Saturday, June 2, at 6:30 p.m. at the studio in Princeton Shopping Center.

Princeton Regional Chamber’s Women in Business Alliance celebrates its first anniversary on Tuesday, June 5, 5 to 7 p.m. at PNC Bank on Nassau Street.

NJEN’s “Gathering of Angels” lunch is Wednesday, June 6 at the Forrestal Marriott.

Joseph Herring, CEO of one of the nation’s biggest clinical trials firms, Covance, speaks at the Princeton Regional Chamber lunch on Thursday, June 7, at the Forrestal Marriott.

The Einstein Alley Entrepreneurs Collaborative meets Monday, June 11, at 6 p.m. Contact Marion Reinson if you have an entrepreneurial bent in a technology field and want to join this group.

Robert Carr of Heartland speaks for ACG/NJ on Tuesday, June 12, 5:30 to 8:30 p.m., at Forrestal Village

A women & technology all-day workforce summit is Tuesday, June 15 at Mercer County Community College.