Using generic lots for club hangouts?

Is there a way to make generic lots selectable as club hangouts? I assumed I'd be able to, but the game tells me I'm not allowed to use a generic lot type for my club to hangout, even if my sim visits the lot first and then tries to start a club meeting. I've had to change it into a bar, and then lock the door to just allow club members, which works fine enough, but I get a lot of random npc's spawning outside the door just standing outside, which kind of annoys me, and clogs my game with npc's. Is there a cheat or mod that anyone knows of that lets me just use a general generic lot type?

I had an idea to change the camp at the bottom of the Sulani volcano into a dilapidated and abandoned shack for my rebel teens to hangout in. It's a little cabin, but with a card table and a bar, where they can explore deviant adult activities ;) It looks great, but turning it into a bar, just so I can use it as a hangout, ruins the concept a bit for me, especially now I have groups of npc adults just milling around outside - it doesnt make it seem like a very hidden place :D