Three independent TDs are protesting at a branch of KBC Bank in Dublin over the eviction of people from a house in Co Roscommon last week.
The three politicians say the protest is also over what they say is the wider issue of how the bank deals with people in mortgage arrears.
Mattie McGrath, Carol Nolan and Michael Collins have been in the Baggot Street branch since 2pm.
They say they will not leave until they get written assurances that bank management will meet with them in the near future to discuss the issues.
A handful of other protesters who said they were from 'Friends of Banking Ireland' are also present.
Earlier a coffin carrying the words 'We must think inside the box' was carried inside the branch.
The bank is due to close at 5.30pm.
The TDs say they do not want to intimidate the staff and said they have treated them decently.
Speaking on RTÉ's Drivetime, Mr McGrath said they are looking for meaningful engagement with KBC management about debt collection and debt resolution.
"We want a meaningful debt resolution process put in place and proper meaningful engagement, and give people a chance about restructuring," he said.
The Tipperary TD added that "the courts and the sheriffs" should be the last resort.