Here are some stats that will clear your doubt:
Rice: 95% students got offers within 3 months after graduation. The average salary was $99,506.
TCU: 87% students got job offers within 3 months after graduation. The average salary was $81,331.
UT: 90% students got job offers within 3 months after graduation. The average salary was $78,107.
The average GMAT scores for the schools mentioned by you are around 680. If you could get that score then it will increase your chances. Your GPA supports your qualification for these schools.
Your profile is unique which shows you are a self-starter and, have an ability to multi-task. The admission committees look for people who have demonstrated leadership ability, multi-tasking ability and, who are results oriented. You have taken several initiatives but, try to explain the results that you achieved. What are the results you achieved during your music tour? You need to write your application essays carefully such that you communicate your point of view.
Best of Luck!http://www.InterviewBay.com
Actually UT-Austin is 92.5% employed 3 months out and 105k base salary. It's the best business school in Texas.