There is no requirement for the members to meet regularly. However, if they do, this will strengthen the protection you have against potential liability.
Member meetings do not need to be held in person. They can be done over the phone or even online; the important thing is to take notes to keep a record of the meetings. This formality will work in the company’s favor if someone challenges its limited liability status.
It is a good idea to hold a meeting when major decisions are being made. If you are a one-member LLC, you should still record important notes as a formality.