Our District has TWO separate RTs, on the same night, same location. No joint meeting, no "breakout".
Boy Scouts is me. Cub Scouts is Jeff. We each have our own email list, send out our own weekly eNews. We email announce the RT place, time, topic, and lots of other interesting stuff . Jeff runs CSRT like a Pack Meeting, When you arrive, you sign in and take a bead for your necker, (a lot of beady neckers here!) give a buck in the jar, and take a copy of the Monthly Program Suggestions (gleaned from lots of sources. Jeff has assistants!) and Baloo's Bugle. A skit (folks are "drafted" into the skit as they arrive, especially new faces!) opening germane to the next month's theme. Then official announcements (Real short) and onto a crafty thing, and then maybe a "guest" that also goes along with the theme. Fireman in turnout gear, doctor /paramedic talks about health issues on hikes and campouts (Cub family campout), docent from an overnight venue (historic ship), that sort of thing. OCCASSIONALLY we meet jointly, like recharter training, or the new program material as it affects both sides of the aisle. And he closes it with maybe an award and a "Cubmaster Minute". He tries to have a snack or if there is a discussion , he will throw candy to the folks that ask a good question (they're all good!) as encouragement. (I throw old camp patches).
Our attitude is if it would be interesting to me, it can be interesting to you. When I took on the BSRT, it had been done by an ex-government bureaucrat who had not wanted to do it, so the RT had devolved into a boring oration of Scout announcements and Powerpoints on camp hygiene and such. I invited a podiatrist to discuss blisters, boots and socks and the rest is history. Doubled attendance over the past year, and folks email me to ask about THAT topic or to be added to the email list.
The Official RT BSA site is a good suggested outline, but hey, you are there, they are not. "Make it interesting and they will come" so long as you have them on your email list and make the RTNews worth looking at. I even get stuff to include off this raggedy site!