In Manhattan, protesters marched from their downtown encampment in Zuccotti Park to Times Square. At JP Morgan Chase's address near Wall Street, they handed customers fliers with instructions about how to close their accounts with Chase and a list of smaller credit unions and community banks.
Today's activity followed Friday's postponement of a planned cleaning of Zuccotti Park by its owners, Brookfield Properties. At least 14 people were arrested Friday for blocking access to the park, authorities said, aiming to prevent what protesters contend is needless, since they've been picking up after themselves.
In other incidents Friday, Denver police in riot gear moved Occupy Wall Street protesters away from the Colorado state capitol grounds, and scuffles erupted between protesters and police over a tent encampment in San Diego. Pepper spray was used to disburse a human chain that was formed around the tents, ABC affiliate KGTV in San Diego reported.
DerGrigorian said he is optimistic that the protests will have an impact.
"My story is very typical of many people of my generation who did everything right. I and a lot of my friends are educated and very smart; yet, we're all unemployed. Those things affect you." said DerGrigorian, who added that he was speaking strictly for himself, even though he is a member of the London contigent's external communications committee.
"It's gotten to a point that this is the only way forward," he said. "This is the most exciting thing to happen in our generation, which is just now waking up. I don't know if this movement is going to succeed. But failure really doesn't seem like an option for us."
ABC News' Linda Albin and T.J. Winick and The Associated Press contributed to this report.