Our own group meets twice a week. On Saturdays we study the Torah portion for the week. Our Wednesday evening meetings go for 3 or more hours. We recommend two hours as a minimum block of time to set aside. Of course, everyone knows to bring only Biblically kosher food.
Disposable dinnerware is a plus for quick clean up.
Sometime during the latter part of the afternoon, some sweet stuff usually finds its way onto the table. The Shabbat Torah study should follow the established calendar of weekly readings, known as the parshat for the week. By following this program, you will cover the five books of the Torah in one year. Click here for information on these online studies. It may be that the person scheduling locations and times, coordinating the food, outlining the study, and doing most of the teaching may be the same person.