Informing the public
If you meet in a public place, as opposed to a home, your club has an opportunity to publicize itself at every meeting. A local pub or diner may allow you to place a poster in their window (even if only during the meetings,) or on a bulletin board.
Some libraries may let you meet for free, but might restrict food items. In any case a public library might have a bulletin board for meting notices, or even a showcase where you could put a display of Esperanto items. Be sure to include contact information in the display.