Mayor Vincent C. Gray adjusts a teleprompter ahead of his “One City” summit at the Walter E. Washington Convention Center in the District on Feb. 11. (Marvin Joseph/The Washington Post)

Grouped at numbered tables as if at a banquet, participants prioritized the city’s issues, ranking the lack of affordable housing and corruption first and second, respectively. They also discussed ways to improve public education, create jobs and dispose of vacant city property.

Thousands of people attend the DC Summit at the Walter E. Washington Convention Center in Washington on Feb. 11, 2012. Mayor Vincent C. Gray, as part of his promise to be more responsive to the community, held the summit to get ideas from the public on government policy and budget. (Marvin Joseph/The Washington Post)

“This is real-time, grassroots democracy, D.C. style,” Gray (D) told the crowd.

But some participants questioned whether their ideas would be implemented while others wondered whether the “One City Summit,” was actually stuck in the past even as it used high-tech devices and was streamed live online.

When the One City Summit began, electronic devices and tweeting were prohibited, according to Carolyn J. Lukensmeyer, founder and president of America Speaks, the nonprofit that facilitated the event. The announcement drew outrage among tweeters — inside and outside the event — and resulted in a reversal by the Gray administration and America Speaks.

The Gray administration acknowledged the summit was a throwback to the administration of former Mayor Anthony A. Williams, a two-term mayor who often had to fight the perception that he was aloof. Williams held four similar events during his tenure, which were facilitated by America Speaks.

In 1999, Williams wore a plaid shirt and khakis, an everyman outfit. Gray appeared Saturday in a sports jacket and tieless.

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