Hows it going george. Well first welcome. I to am older, I have two grand daughters. they dont play but i do.
Well you really have a huge list of options. There are three airsoft store in the valley.
1. Arizona Paintball Depot (they airsoft stuff to) 28 St. & Bell
2. Command Post I-17 & Bell
3. Gear Box. Tempe
A little advice, Don't ask which one is better. People on here like one or the other. And they HATE the other.
My favorite is Arizona Paintball Depot (APD)
I have see guys a lot older than me playing, and kids as young as 14 and younger.
As for fields. I know of three right off hand.
1. Vanguard (gilbert) All in door, climate controlled, light controlled, You are required to buy there BB's. They charge $15.00 a session, session only 4 hours.(I have never played there)
2. Fort Adobe (Phoenix) Outdoor. Open area, some CQB (Close Quarters Combat) they have 2 fields. You are required to buy Bio BB's, They charge $20.00 for all DAY
3. Fightertown (surprise) Outdoor 5 fields, Huge open area on field 1, real nice CQB field. There pictures on there website dont do them justice. Any BB's. They charge $15.00 for all DAY.
Fightertown by far is my favorite fields to play