That's great! Would that be in real life meet-up or an online version of it?

In both cases, yes, Lightning is great, but exclude a lot of people (and bitcoiners) that don't know or simply don't use Lightning. It's good that you are trying to merge these two passions, but you cannot expect others have to have the same match.

if your goal is to have fun and organize poker tournaments once a month, I'd focus on that first. Gather the crowd you like, then slowly, as organizer, you could provide options to buy chips with, including lighting and bitcoin.

I'd start simple, find the location first. I fear that if you promote bitcoin+poker, people will continue seeing it just as a gambling game, instead of sound money.