Gayman informally organized under the name the Church of Our Christian Heritage.

Linux India is an informally organized community of mailing lists and a web site.

Since 1970 to 2012 almost every major city in Canada has at least one taiko group, usually organized formally or informally with the local Japanese community.

The iceboat club is an informally organized club.

While organized informally, they typically involve large numbers of small investors or lenders:

The Association was informally organized in 1877 to prepare for the centennial anniversary of the battle.

All hands, including her captain, joined in and the Enterprise bustled with work parties, frequently made up of people officially off duty and informally organized.

However, it was informally organized earlier, sometime in August 1913.

Local government is unpaid and informally organized among the citizens.