Last time I visited the Royal Marines Museum (3 years ago) I took 50 young musicians from the North West (by coach -we were accommodated overnight on HMS Bristol) & we joined the Royal Marines School of Music Band at the museum to hold a "music workshop" where the youngsters practised their music with RMBS tuition. The youngsters & Band made a recording on site & all got given a CD (digitally cleaned-up so it sounded brilliant) with their respective School Crest & the RM Band crest emblazoned on it.
A fantastic memory for all the youngsters, but well worth a visit to the Museum- I wandered off and have to say, to my shame, it was the first time I'd visited the museum, but thought it well worth the visit. The irony is that like HMS Victory, The Submarine Museum, Mary Rose, HMS Warrior, the Historic Dockyard, Explosion, etc., we all know it's there, but we seldom pay a visit.
Funny you should mention it *text deleted* me and Tarod (also from this site) are probably heading down there this tuesday, we're both local so its not much effort for us to make, i've been there once before and if you're ever lacking in motivation or finding your training boring or tough then this place will definately boost your drive. its well worth the visit!
I was last there 2 weeks ago, now isn't really the best time to be going... The Minstrel's Gallery is currently a building site due to restoration work and the downstairs exhibition area has been closed whilst they put in a new exhibition, so I'd recommend you leave it a few weeks and phone them to find out when all the building work will be finished.
As people have already said, it's an incredible place to visit though! To see the opulence of the the former RM Officers' Mess is amazing... The medal room is staggering, especially seeing the complete collection of ten Victoria Crosses awarded to the RM.
If when you buy your Admission ticket you make a 'gift aid donation' (doesn't cost you anything) they'll give you an Annual Entry Pass which gives you free admission for a year...