Sorry for the late response, where I play, the places are organized in WhatsApp chats, It's not the best organization, but it kinda works, if you call a local place where you want to play, they may include you in the Whatsapp channel where games are organized.
It usually works like so: If i want to play a game in day X at Y hour, I'll ask for opening a game in day X at Y hour, if it is available, they will open a game in the channel stating the date, free seats and level, and other people copy paste the game opening message filling the open seats, when the game is full, the organization books the slot and we go play at the defined date/time.