A new two-for-one deal on tickets to Girls Only: The Secret Comedy of Women--a two-woman show that incorporates sketch comedy, improv, and even the audience in examining the finer and funnier aspects of being female--is a good excuse to get together with the ladies in your life and put the savings toward a girls' night out. The offer can be applied to performances, which take place at the Denver Center for the Performing Arts, beginning tomorrow and lasts only through Sunday (no show on Saturday due to the holiday). Tickets are generally $29, and the trick to taking advantage of this offer is to select the "Promotions" link on the left side of the Denver Center's "Ticket Office" page, then type in "JULY" once you're prompted for a promotional code. For pre-show libations stop by the Rialto Cafe, just a couple blocks northeast of the Performing Arts Complex, along the 16th Street Mall. Rialto's happy hour runs from 3 p.m. to 6 p.m. daily, with $3 drafts, $4 wine and appetizers, and $5 specialty cocktails, like the Rialto pink diamond martini--perfect for getting into the girly mood of the evening. The combination of Stolichnaya vodka, peach schnapps, pineapple juice, and a splash of cranberry has a reputation for being a favorite among the ladies.