We played the Himalayas and yes, it was a blast. In answer to UncleTom's question, I think it took my husband and me about an hour and a half. (We tend to play "ready golf" and pick up the ball after x number of unsuccessful tries, and we're rather lax about keeping score.) There was nobody ahead of us, and one foursome that started behind us and finished way behind us.
The clubhouse has a big "Members Only" sign on the front, which made us think we'd gone to the wrong building, but there's a small window around the left side where you pay and get your putting club, ball, and score card.
Note there are no lockers or other facilities to leave your belongings, so if you're wearing a backpack guess what -- you'll be playing wearing it.
The geology of the Himalayas is basically grass-covered sand dunes, i.e. you are right by the North Sea, so dress for wind and rain.
You do not have to wear golf shoes. Sneakers, oxfords, or basically any shoes/boots with flat/low heels are fine. Just no high heels or spiky ("kitten") heels.