“Luncheon of the Boating Party” by Renoir, 1881.

An OSR campaign idea: A pseudo-Victorian / Edwardian society, a newly fashionable seaside resort. Coast on the west, wide and romantically desolate mudflats to the east. In summer, the fashionable gentry (the players) flock to the hotels and boulevards. Near the end of the season an aether storm struck and the train line home has sunk into the ooze. Now you are all overwintering in the cold and spray-splashed streets.