Lafayette has too many cars and not enough roadspace, and it often results in slow-moving traffic. It happens at all times of the day (not just typical rush-hour time), so trying to get 3 miles downtown can take upwards of 20 minutes. Just a general warning if you have a deadline to meet!
See the intro, beware of the terrible condition and location of the Amtrak station here. It is a druged out burned out old building in a rather bad side of town with nobody working there. But it does have a nice, brand new sign!!!
You'll definitely need a car to get the best out of Lafayette, as the dance halls, restaurants and hotels are spread out some distance from each other.