The Wikipedia article about Rolinda Sharples has a paragraph about this work, "This painting, which resides in the Bristol City Museum and Art Gallery, has become one of Rolinda's most recognizable images for fans of Jane Austen and the British Regency. The image has been used for numerous books, most notably A Portrait of Jane Austen, by David Cecil, Jane Austen's World, by Maggie Lane, and High Society, by Venetia Murray. One reason for its popular use might be that only a few Georgian paintings exist today that depict assemblies in progress, with people dancing or moving around. Rolinda's painting shows a group in the cloakroom preparing for the evening. In an interesting aside, the Clifton Assembly rooms still survive to this day."
One young Lady is swayed by a uniform while her escort in civilian dress looks on warily. A gentleman in civvies is wooed by two blushing (or is it overly made-up) Ladies.
From John Blakey's photostream on flickr.