It’s like I have to choose between one or the other.
Indeed.
People will come on this thread and equivocate with you, but the reality is that these behaviors under discussion are completely contradictory to peace, composure of mind, renunciation, and the abandonment of the world. The ultimate goal of practicing the Dhamma is the total abandonment of craving and clinging towards every single source of ultimately unsatisfactory “satisfaction” that you habitually attempt to extract from your senses through your engagement with the world. Attempting—mind you—while eternally failing to succeed. Singing, dancing, and raucous laughter are completely incompatible with terminating the futile process of attempting to find happiness through passionate living; these behaviors are in fact some of the most intense forms of movement in the exact opposite direction. They are moving in the direction of entanglement, agitation, distraction, heedlessness, craving, and madness. The only behaviors more incompatible with Dhamma would be sexual intercourse and breaking the five precepts.
If you want to practice what is commonly understood as “Buddhism”, then by all means, glean whatever happiness you can from this religious tradition, its mythology and meditation techniques, and then go on living mostly how you already do. Buddhism can be—and usually is— another religion like any other. But if you want to practice the Dhamma then, well, some major life changes are going to be in order.
For a practicioner of Dhamma, sitting and doing nothing all alone in a hut in the forest all day should sound like an appealing lifestyle. Eating a single meal of assorted almsfood a day, all dumped into a jumbled pile in a bowl and scooped out with your bare hands, should sound like an appealing lifestyle. Never having sex or engaging in entertainment or any social or political or economic or artistic activities or shows or gatherings whatsoever should sound like an appealing lifestyle.
With that mode of living that is presented in the EBTs in mind, it’s not hard to imagine how insane something as coarsely sensual as dancing would appear to such deeply restrained, aloof, composed, unproliferated and austere samańas as the Buddha and his disciples.
There is sensuality and there is the end of suffering. Pick one.
You can believe that there isn’t a choice to be made, but that belief will itself be an expression of what choice you’ve made.