A supper club generally refers to an organisation or establishment that serves both a culinary and a social function. At a supper club, the company you keep and the conversation are just as important as your meal. You can treat your friends to a night at a supper club restaurant or you could start your own.
In a supper club, the work is divided evenly amongst the members so keep that in mind when inviting people. Before you begin, you will need to organise an assembly space and meeting and food arrangements.
The cheapest meeting space is your own home. Every member should have a turn of hosting in their own home to ensure that the work is shared. For a more formal supper club, pull out your best tablecloths, purchase linen napkins and use your best china and glassware or, for guests with butterfingers, you can purchase fancy plastic ware.
If hosting at home is unfeasible (perhaps your members don't have the space or still live with their parents), then organise to hire a room for the night. Try local RSL and leagues clubs, restaurants or scout halls and split the cost between the group.
Now you can take care of food arrangements. If you are meeting somewhere that serves food, each member will be responsible for paying for their own meal. If you are bringing your own, you will need to work out who brings what. You can assign meal aspects (drinks, mains, side dishes) or specific meals (two litres of lemonade, potato salad, half a dozen chicken drumsticks) to each person, or you can make it a simple pot luck, where each person brings whatever dish they like. You might also consider having a food theme, such as Asian, vegetarian or tapas.
The third ingredient of a successful supper club is conversation. The tone is up to you, but these clubs generally allow for a higher level of conversation. As the organiser, it is up to you to ensure that conversation runs smoothly. You could set the topic for each meeting or allow it to flow organically. Just be sure to have some conversation changers on hand in case things heat up!