I was wondering that too, and if there actually were any projects working towards rotating space habitats.

> However, there are no current practical outer space applications of artificial gravity for humans due to concerns about the size and cost of a spacecraft necessary to produce a useful centripetal force ... Scientists are concerned about the effect of such a system on the inner ear of the occupants.

https://en.wikipedia.org/wiki/Artificial_gravity

Looks like visitors to space will have to keep dealing with zero-gee for the foreseeable future.