Looking to work your brain and (sometimes) your belly tonight?  Consider some of the lively Philly Tech Week and Philadelphia Science Festival events happening around town.

Both the Philly Robotics Expo and Mobile Monday Demo Night are  sold out, sorry. But you can still get in to PTW's  "Performing with Technology," a night of sound installation, interactive dance and experimental electronic music at the fidgetspace, 1714 N. Mascher St., 5-8 p.m. tonight (free).

More interested in futurist theater with an on-line interactive component?   Check out New Paradise theater company's "Digital Performance in a Possible Future" presentation,  free from 6:30 to 8:30 p.m. at Hamilton Hall, 320 S. Broad St.

Just a handful of spectator slots remain to be claimed for tonight's  inside look at  web coverage for this week's Philadelphia Eagles NFL Draft. The Eagles on-line team calls the plays from 6 to 8 p.m. at the Apple Store, 1607 Walnut St., free with reservation here.

No cost (unless you start drinking or eating) Science Week action tonight includes a Science Quizzo, 6 p.m. at National Mechanics, 22 S. 3d St. and a discussion of rare "Orphan Diseases: What Are They and Why Should We Care?" 6:30 p.m. at Rembrandt's, 741 N. 23d St.

Likewise taking science to the pubs is the free  "Science a-Brewin" discussion  6:30 p.m. at Iron Hill in Chestnut Hill, 7400 Germantown Ave. Herein you'll learn about the  importance of wetlands and water in the production of beer (and other stuff), as analyzed by folks from the Morris Arboretum and Iron Hill Brewery.

Into the latest diets?  Chomp down on "Science of Nutruition: The Gluten and Dairy-Free Fad," at 8 tonight at Pure Fare, 119 S. 21st St. The $10 admission includes dessert samplings, yum.