Lacking holoprojectors, however, they'd have to continue serving the hyper-toxic rum drinks so people could imagine their favorite scenarios.The easiest thing will probably be to carpet it and throw up some kind of casino siding and a ceiling of some kind and throw a bunch of slots in there.
Maybe they could paint it black with yellow lines and just call the hole a holodeck.
I'd still show up, just for that.
Maybe they could pad the walls, like a Jumpy. We could take off our shoes before we go in, grab our drinks, and then bounce around in 'the holodeck.'