A holosuite uses transporter technology to create holographic images in much the same way that a holodeck does. However, holosuites are in wider use than holodecks and are not limited to starships. There is also more variation in holosuite design than holodecks.
The Ferengi entrepreneur Plegg is credited with designing the first holosuite and is responsible for its subsequent spread across the galaxy. (DS9: "The Alternate", "Body Parts")
Generally, holosuites are much smaller than holodecks. They are intended for individual or very small group usage unlike holodecks which have been known to accommodate dozens of people. (TNG: "Homeward") Aboard Template:ShipClass starships, there were twenty holosuites on decks 12 and 33. Aboard Template:ShipClass starships, holosuites could also be used by several people. (Star Trek: The Next Generation Technical Manual; Star Trek: First Contact)
Aboard starbase Deep Space 9, Quark had several holosuites available in his bar. (DS9: "Dramatis Personae")
Some wealthy individuals have their own private holosuites, although due to the costs and maintenance this is uncommon. (DS9: "Meridian")
Apocrypha
In the Deep Space Nine book trilogy Millennium it is revealed that Jadzia Dax and Worf enjoyed using Quark's holosuites to re-enact the events from TOS: "Day of the Dove". Dax would dress as an Enterprise crewmember, while Worf would take on the role of Kang.