Hi Trish,
On our street we had three retired dentists at one point. They were active in so many other things, they golfed with the group of men from our street, they attended our socials, as well as whatever else they did here in the community. Two have moved away, but one still is with us...
We have retired nurses, dietitians, and a pediatrician, (as well as many who worked for the government, their state, various companies or organizations, themselves, etc).....and as much as they enjoyed "giving" to their patients, they've learned a new way of giving, here in TV...charities, helping at the Charter Schools, helping at their churches, etc. If there are groups that meet, I'm not aware of them. If he would like to organize a group, he'll have that option.
When you get here, you might find that life is different. So many people have had interesting careers and life experiences that you'll enjoy hearing about. Life will be about what you are now, and not what you were or did. Hubby was in health care, too, and he loved his patients, but it was time to retire and enjoy some leisure time...and he does!