It’s the Town of Greenwich’s version of the wave: first, Old Greenwich stands up and puts end of season stuff on sale. Next, comes the Grandaddy of Sidewalk Sales – the Greenwich Ave. bonanza. Now, it’s Byram’s turn, and it seems as if everyone in this getting-cooler-by-the-month enclave is participating. Lolita Cocina and Tequila Bar, Cynthia’s, Fin and Feather, Firehouse Deli, Side Door, Salon O and more are slashing prices and offering promotions and deals. Thursday July 22 – Saturday July 24