Dancing is a fantastic activity that can allow you to burn some calories as well as express yourself a lot more thoroughly than might have been the case otherwise once all has been said and is now out of the way. The reason behind this is that you would basically just be moving your body in the way that it naturally wants to move, and on a party bus with the music and the lights this movement would come from a place deep inside of you that you might not even know existed.
You need to figure out how you can make the dancing that people are taking part in the best that it could possibly be. There are several ways in which you could go about doing this sort of thing, but the best technique for your San Marcos party bus by far is going to involve hanging a disco ball up. This would reflect different kinds of light onto the dance floor and make it so that sporadic bursts of illumination would occur as well which would essentially result in people being sent into a reverie and then brought back time and time again.
Disco balls make people really energetic, and you would notice that the party vibe would become a great deal more intense once you have the disco ball hanging up. More people would be encouraged to come to the dance floor. Some might not even like to dance, but in spite of the fact that this is the case they would be compelled to take part in it because the disco ball will have mesmerized them and will have made dance their only real purpose in life.