Will Adventurer's League be profitable to our cafe?

Wow! Thank you all for the helpful replies!

Magic the gathering is a bit saturated in our area (thus we figured that we focus on the boardgame and RPG niche) though i admit that it brings money.

Profit do come from food and drinks, the games and rpg are there to attract patrons. We are actually running D&D hard covers, we dont pay a DM because a patron does and have set out cafe as his gaming area. We haben't paid for AL event yet but D&D is now an attraction in our cafe. Games are usually 4-8hours (as long as they order food and drinks).

Thanks for the follow up. I'm glad that it is working out for you!

A friend runs a dedicated gaming space after the local FLGS closed. It's $7 a seat for players, DM gets a ticket to play for free at some other time. But unlike you they don't make anything with food/drink sales - they allow outside food/drink (even have a frig and microwave available for use), and have some (non-alcoholic) drinks and snacks there but at a flat $1 each price.

They have two rooms and sound dampening dividers between tables - if players are in a single main room with your other customers they might be loud and detract. Or be colorful additions - you know your clientele best.

Here's an article about them that Adventure's League wrote up, though it's a bit out of date.
http://dndadventurersleague.org/spotlight-nn-adventuring-company/

Great article! Its an inspiratio, thanks for sharing!