Womenfolk can enjoy a night out on the cheap at Ristorante Olivio, where chef-owner Angelo DiGirolamo hosts a weekly Ladies Night. Every Thursday night, members of the fairer sex can enjoy a two-course prix fixe for $23.95 each. Choices range from lightish salads to hearty pastas so there’s plenty for every type of ladylike appetite. There are also $6 cocktails (margaritas, cosmos, bellinis, mojitos and sangria) to wash it all down. Get a girlfriend or a whole gaggle of gals together for a night out in Arlington. Call 781.648.2300 for details and a table.