In Vegas, at the Horseshoe (formerly Bally's) there's the indoor Twilight Zone golf, and we had a great time there! And it's still open even now. Vegas also used to have KISS (as in the band) indoor mini-golf, but I think that closed a while ago.
Belmont Park has a mostly indoor jungle themed mini-golf. Haven't done it yet, but it doesn't look bad.
I'd really love to se something like Urban Putt (in San Jose), Puttshack (Arizona, Denver, or Dallas) or the Puttery (various locations in the Mid-West and East Coast). They look pretty detailed, and many of them even serve alcohol! Not a huge draw for me personally, but I know many others would enjoy that.