General:
* Near
* Close to
* In the vicinity of
* Adjacent to
* Approximately (for numbers)
* Roughly (for numbers)
* In the neighborhood of
* In the region of
* Near and far
* Here and there
Specific:
* Surrounding
* Encompassing
* Circulating (if moving around)
* Hovering (if staying in one general area)
* Conversing (if interacting with others)
* Wandering (if moving aimlessly)
The best word will depend on the specific meaning you want to convey.