Establish a sign-in list for visitors so that you can continue recruiting and notify them of new events. Ask the ISSA director of membership for assistance. Open a checking account - Headquarters will obtain your TAX ID when you submit your bylaws. Some chapters meet at lunch time and others at dinner. There could even be breakfast meetings.
Most chapters have a monthly meeting.
Although recommended, it is not required. Some chapters have large quarterly meetings, like mini-conferences. Usually if you eat during your meeting you can arrange for a meeting place. If you do not plan to have meals available, you could meet at a public building. Some city, state, provincial, and federal agencies allow meetings to be held in their buildings.