SNAPSHOT: Austin Seems Hotbed of Alt-Sweetened Sodas    They don’t just like music that’s alternative in Austin.  During quick visit this week, it was hard to avoid CSDs with non-traditional sweeteners (which of course can mean real sugar!), stoked by burgeoning interest among alternative eateries such as Torchy’s Tacos chain (which offers jerk-chicken variety on menu) and Alamo Drafthouse eat-at-your-seat cinemas.  Mexican Coca-Cola in tall half-liter contoured glass bottle was nearly ubiquitous and Austin also is 1 of 5 test markets for Dr Pepper Ten, 10-calorie version using blend of sucralose, aspartame and ace-K.  Also available was Dublin Dr Pepper, from co’s oldest bottler in Dublin, Tex, packed in 8-oz nonrefillable glass bottles branded with Imperial sugar, sweetener used in original formula.  (Bottle sports #s 10, 2, 4, signifying times when body could use a pick-me-up.)  Big Red has thrown hat in ring with real-sugar-sweetened version in 12-oz clear longneck bottle targeting “cool bars, cool places,” said prexy Gary Smith.  He noted that, while Big Red’s core market is in San Antonio, it barely ekes out 200K cases in Austin, just an hour up road.  Some consumers will drink real-sugar-sweetened Big Red at Torchy’s but not touch conventional Big Red at nearby HEB, he noted.  Valero’s gas stores in region have bev set that includes Mexican Coke, Pepsi Throwback and Big Red versions.  Stevia-sweetened Zevia gets heavy space in Whole Foods flagship store in downtown Austin.  Of course, Austin is hq these days of Maine Root root beers, all-natural altsoda line made with real sugar.  So even in bevs, all hands are on deck keepin’ Austin weird, as bumper stickers like to urge.