The DC Grotto currently has monthly meetings using ZOOM. Meetings start with reports on recent cave trips, followed by announcements of upcoming cave trips and other events, and a program on a cave-related subject. The meetings normally last 60-90 minutes and are very informal. A list of upcoming meetings is on the home page at Main-Page.
You don't need to be a Grotto member to attend a meeting, and everyone is welcome.
There is no regular meeting in December, Instead, the Grotto hosts a Holiday Banquet that is usually held on the first Saturday in December. The specific date, location, and program are always made known by announcements and flyers sent out a few weeks before the date.