Mike Huggins talks about his newly-published book Horse Racing and British Society in the Long Eighteenth Century at Proofed, a blog of Boydell and Brewer:

I had not realized how important the annual racing week was in the leisure calendar of so many county and large market towns during the eighteenth century, helping foster consumerism and the urban renaissance. For many women of the middling classes for example, the racing was almost incidental, but was looked forward to for weeks before with a mixture of excitement and apprehension. It offered many social opportunities; socializing with the titled and the county set, attending assemblies, balls, the ordinaries or the theatre, appearing in the grandstand, and dressing up, demonstrating status and conspicuous consumption.

Racing was equally significant politically. The early Jockey Club was much more than a racing club. Its members were mostly Protestant, Whig and committed to the defeat of Stuart Catholicism, and were usually MPs or otherwise leading figures in the political elite, like the Duke of Bolton. Racing played across divisions of Whig and Tory, court and country or Hanover and Jacobite in complex ways. Hanoverian sons demonstrated their independence against their father by spending money racing. Race meetings were sites of assembly for political discourse where prospective and current parliamentarians lobbied for support, exploited the dynamics of patronage, or used attenders as focus groups.

More at the link.