The first matter of business is locale. Ordinarily, we'd suggest you gather at a cosy pub or cocktail spot — ideally one with a literary menu (more on that in a bit). Given current circumstances, though, choices are limited.
In lieu of corner booths and high-top tables, try gathering on Google Hangouts, Zoom, or via Book Movement's Book Club app (made expressly for digital book clubs). Pro tip: recommend everyone allow five to 10 minutes for tech set-up before you dive into a provocative conversation about your chosen book; goodness knows we all need a bit of time to tackle last-minute technical difficulties.