Ethically, what's your rule?

I've been out of enm the past decade to focus on other things, and am getting back into the lifestyle and dating with my wife, both together and solo.

We both lean more towards FWB and play parties than long term emotional poly. (Although who knows what may come from the adventure.)

I'm in my late 40's, grey in the beard but still in very good shape, and have already attracted the attention of a few women in their late 20's at events and online. I don't actively look for younger, but apparently older men are a thing right now.

My "hard no" is no one under 25, and a "soft no" under 30 with room for more mature partners to potentially stand out, though over 30 is my preference.

What say you all? Do you have a "that's too much" gap for yourself? Does mine sound reasonable?

And does context matter? If it's at a play party or club event does that factor differently than one-on-one time?

Discuss!