hm, any peice of bondage furniture can be a fun one to use for tickling, so i guess it wouldnt be SO different from a normal dungeon.
minus stuff like watersports toilet seats and such.
And cages/boxes to lock slaves away in.
You would need to replace whips and paddles with various tickling tools,
Lotions etc at the ready,
ive always thought it would pretty fun to be tickled on one of those spanking box things where your tied in a sort of kneeling position, it greatly reduces how wmuch you can use your legs to shift yourself around.
And your typical cross that could be rotated of laid flat.
stocks of course
suspension equipment?
one of those mummification net things could work, the ones that can also be tied to the ceiling
coming back to boxes, I used to fantasize about a light proof box. it would open up and have restraints fixed within and holes at one end for feet to stick out of. Once tied still, the box would be closed and locked. There would be various holes with some sort of push thru sleeves to keep the light out and you could access ticklish areas from there, That would be a pretty cool thing to have in a tickle dungeon 😀
The posibilities are endless, perhaps a comfy option like a purpose built bed too.. 😛