IT has been only two months since the Obamas moved into the White House, but here in the nation's capital, some people are already asking: Have you bumped into your president and first lady yet?

This is no idle question. During the Bush years, Washington got used to a homebody president who preferred bringing friends into the Executive Mansion to venturing outside it. But these days, President Obama and his wife, Michelle, are popping up all over this city.