Are you referring to insuring the real property of the space, the physical property contained therein (ex tools and stuff), or liability insurance for your club and its agents? What is the legal structure of your club? Own or rent? Do you have a mortgage requiring a specific kind of insurance?
Our club is organized as a 501c(3) nonprofit corporation containing 5 FIRST teams, and we generally open our space to visiting teams and sometiems host events and camps. As of last year when I was the student board member, we had a single contract with a insurance group specializing in nonprofits that came with a rate card every year where you would pick pre-made coverage amounts in each category. These are rough estimates but I think we had something like $2.5M in bodily injury liability, some lesser amount in property damage liability, maybe $10k in inland marine (covers personal property owned by the club), and I think some coverage in case a director of the club was found personally liable (normally something called the corporate veil protects directors from being sued for what the corporation does, but this can be broken in certain cases).
Always read policies in full before signing and have all exclusions fully explained to you. Be aware of notification provisions that may require you to alert the insurance carrier of a possible claim as soon as it occurs, even before legal action is taken. The insurance company has a right to defend claims so never sign any settlements or pay money to someone who is injured or accept fault without talking to them and ideally an independent attorney.
We rent one property and use space made available by corporate sponsors, so we do not have and real property that we own and need to insure. If your club owns the building outright, that will obviously be something you want and it would very a lot by the type of building (masonry, brick, etc), if there are sprinklers (this is a huge factor in cost of policy), is there a fire alarm with automatic dialer, etc. Flood insurance would be separate and you need to check the government flood maps to see if you are on a floodplain.
Also there can be some traps regarding fire code and occupancy classification which could come up not only in inspections but also in the event an insurance claim is necessary. The authority having jurisdiction in our area got our sponsor-hosted space closed down last year because they classified our use as Education - E (we believed this was wrong as it only applies to true schools, after school education, etc, not clubs that happened to have student members under the Internaional Fire Code, but it didn’t matter what we thought lol). This would have required walls built to separate it from the industrial facility classified as Factory Medium Hazard - F2 However, if you are teaching summer camps, especially with little kids, or if your meetings are drawing big crowds or have fixed seating like a theater or something, it’s possible that Assembly - A or another category could apply. You will also want to make sure that all fire code issues are corrected before possible site visits by the insurance company. This is important because some types such as Assembly have fixed max # of people present while others do not, and because some require sprinklers and fire alarms while others don’t.
Example violations that we have had include: not maintaining 6’ clearance around electrical panels, extension cord used as permanent wiring, extension cord ran through holes in the drop ceiling, overloaded outlets, tape on electrical breakers, and the two we actually got written up for were not having fire extinguishers up to date (your local fire extinguisher store can tell you how many are needed based on size and usage and when to service them) and defective exit signs/floodlights (hit that test button every week). In our city, there is no fee if fixed by the first re-inspection, other cities that is very much not so. While on the topic of the fire code, you should find out how often your regular inspections will be and when the next one. Remember that a complaint inspection can occur at any time.
With the advent of COVID, of course we have not had people coming to visit and also we have instituted waivers of liability for all members. The virus was our motive in implementing them but of course they can also play a role in liability mitigation for injuries, etc. The issue is that when minors are involved, as they always are in FIRST, it is not as simple as getting the parent to sign. In many states, contracts purporting to waive the minor’s right to a legal claim for injury signed by a parent have been found to be unenforceable. You should consult with an experienced lawyer before developing waivers as poorly written or overly broad ones may be unenforceable. Never have the mindset that because you have a waiver, you do not need to be on the lookout for potential sources of liability.