You need to memorize the mantra, so repeat after me:
"If I post the time and place they will come."
It saves all the hassle of folks bickering arguing trying to get unamimous agreement working towards consensus talking about it instead of just doing it.
Remember, if just one person shows up you have doubled the number of attendees. And if nobody shows up, do it over again the next week. Lather, rinse, repeat until they do show up.