In the page's words:

The members of the Verein der Hamburger make a valuable contribution to preserving Hamburg's culture and traditions. According to the motto "Shaping the future with tradition", everyone can become active in the association. There is bound to be something for you. Members receive preferential notice of events and have the opportunity to take part in internal activities. The membership fee is 40 euros per year.

Most events are free of charge with a donation requested.