I started a new campaign this weekend with my wife ( who has roleplayed a few times but never OSR), my daughter (who I have been playing an OSR game one on one with for the past few months), and three friends of ours who have not played a tabletop RPG before. I decided to use Basic Fantasy (with some optional rules thrown in) and Dwimmermount.
I started them out at a tavern where they tried to get information from a party that had just come from Dwimmermount. The thief also successfully pick pocketed the party's map case and then, with another successful pick pocket roll, replaced it with one of theirs. The map only had a couple of rooms on it as I said this party had only explored a few rooms, encountered resistance and then fled. But the next morning, they hiked to Dwimmermount and then proceeded to not explore those couple of rooms. Instead, they found a lot of empty rooms, ghosts who ignored them, and the face that they're trying to question. They did find some centipedes but closed the door quickly. Also, they ran into a group of kobolds on patrol which they fled from. Finally, as the night grew late (real time), they ran into a group of orcs which took them prisoner without a fight until a crab spider dropped on an orc and in the chaos, the party escaped. They ran through a secret passage the elf had spotted on the way and found a bit of treasure. Next time, we'll pick up from there.
Everyone pretty much knew what to do from videogame experience although I tried to emphasize the differences: orcs could be negotiated with, monsters did not just sit and wait for adventurers before doing things, etc. I also had them make backup characters in order to show them that death may come quickly but they could get back into the action with their backup. We all had a great time and are looking forward to the next time when we find out if our brave adventurers will get out of Dwimmermount alive!