They did sing, although what they pass for "music(??)" is pretty wretched. They do pray, to joke-hova. They do practice piety, including obeying strict rules against having any fun, in the name of joke-hova. They believe joke-hova is watching everything we do, and the slightest problem results in destruction for us. They read parts of the LIE-ble, though out of context. And they use the LIE-ble to threaten destruction.
If you are expecting full Christian worship at the boasting sessions, forget it. They worship joke-hova instead (Jewish--that's their god). They have works-based salvation though proclaiming otherwise--field circus being the works (Jewish--they also did works and obedience to gain salvation). You are more likely to see their acts as "worship" if you view them as a hybrid religion that practices deception, rather than pure Christian. (Of course, that doesn't mean their worship is pure, right, or correct.)