The simple test is to organize one.
Pick a location. Decide whether you'll announce the location here or by email or PM to those expressing interest.
If email/PM, gather a list of folks to notify
For the location, since you're describing "event", I'll guess that you want to have an event that has tickling in it, which leaves out a munch (a social event in a public place). The choices are your home, a rental (hall, hotel, etc.), or outdoors. Given the time of year, indoors is likely better for you.
Past that point, given that it's publicly posted, liability is reduced, as anyone here knows the context (or at least has the ability to read up and find out).
There are ways to make it easier for yourself. Host a munch or two, and befriend folks. Invite them to assist, even if only by having your back. Buy beverages in bulk, and avoid strong alcohols. Nervous people get hammered and that's no good for playing. Nevermind the inevitable of too much booze.
Host the actual gathering shortly after the dinner hour in your area. You want folks fed and set, preferably having already digested a bit. Buffers for the possibility of any drink, and will provide the energy burned rapidly by excitement (who in this interest WOULDN'T be excited?).
There's more, really, but that's a quick off-the-top. It's simple, but it's not easy. If it were easy, more of them would happen in large cities.
