We're headed from PHX to Austin to celebrate a 30th birthday (alas, not mine, as that passed long ago!). We're staying downtown (4th street??) and are looking for something nearby with a fun atmosphere--not a dive, but not romantic, something in between. Any recommendations? Something authentic but not touristy (kitschy/quirky is ok), with entrees $25 or less. Any advice is appreciated. Already I've been convinced by the boards we need to try Amy's ice cream--so thanks!