I've only done this at home so take it for what it's worth. If you've got the time in the afternoon, say around 4:00 PM, put your beans in a pot and boil them for 10 minutes. Cover them and and turn off the heat. Let them sit for at least an hour. I ususally let them sit for 2 hours. If you can, drain and rinse then cover with clean water. That gets rid of all those enzymes that give you gas. You then bring them up to a simmer and cook until they're as tender as you like. I've had them cook up in about a half hour but I'd plan on an hour. It sounds like a long time but you're still eating by 7:00 PM and it gives you time to munch on some snacks and enjoy a cool adult beverage. Adjust your starting water level based on how soupy you want the final product. If you're going to be right there to keep an eye on them you can start with less. You really don't want to deal with cleaning the pot if you let it run dry. I'd rather toss it and buy a new one.
Joe