Okay, I pulled the daily Passages for the Navigator cruise out of FLL last December. I can't believe I keep these things, my husband thinks I'm totally bonkers.
It may be different on Voyager (and I can't find the ones from our 2006 Voyager trip), but on Nav, the muster drill was at 4:15. "all aboard" was 4, and departure was 5. That sounds about the same as this time. The block party was 6 p.m., with wine and chocolate served (it was the chocolate cruise.)
Now I remember--Navigator's departure was delayed for logistical reasons, so the block party and the sailaway overlapped. Sounds like they try to plan it so that does not happen, which is great.
A quick drink after the muster drill sounds fine to me. How about the Observation Lounge? Or it could be the poolside bar, depending on the weather--how's the weather, Betty?