Want to build One City, learn about ecological sustainability, visualize the city with technology, discuss balancing preservation with innovation, or support bicycle advocacy in the region? These good causes and interesting events are coming up:

DC Neighborhood College’s “One City Community Leadership Forum” is taking place both Friday night and Saturday morning. Mayor Gray is the keynote speaker for the June 3 kick-off, and June 4 plenary panelists include Steve Glaude of the DC Office of Community Affairs, Nikita Stewart of the Washington Post, and Steve Moore of the Washington DC Economic Partnership. RSVPs are requested.

The Coalition for Smarter Growth is hosting a walking tour on Saturday, June 4, in Alexandria which will look at the difficulties of stream restoration. The tour will start at 10 am at the Sherwood Hall Library and work its way along Richmond Highway examining new infiltration and stormwater management methods.

The 24-hour City Project asks 3 teams, “If you had just 24 hours to impact your city, what would you do?” Their responses, meant to “reveal the relationships between the built environment and technology,” will be demonstrated and on display for over 24 hours as part of the National Building Museum’s Intelligent Cities forum, June 5 and 6.

On Tuesday, June 7, NCPC will host a panel discussion as part of their Contemporary Design, Historic City series.  Titled The Balancing Act Between Innovation & Preservation, the talk will examine how contemporary architecture can coexist with DC’s historic characteristics.  The event will be held at Catholic University, and though it’s free and open to the public, RSVP is encouraged.

Finally, WABA’s major summer fundraiser, BikeFest, is Saturday, June 11th, from 8 pm to midnight in Crystal City. Besides the “carnival-cycle games, a silent auction and raffle, sideshow performances, live music and dancing ... palm readings, photobooth and much more,” three area bike shops will compete to create custom bicycles using low-cost, recycled materials.

You can get more information about these and other events on the Greater Greater Washington calendar.