my husband has stage 5/6 now but is desperate for company and conversation but he is losing his ability to converse and he is apt to invite strangers to the house, he is very lonely and I don't know a safe way to socialize him when he himself can't converse intelligently and is unpredictable, we are now isolated as a couple period.
Since you say that he's losing the ability to speak much, I might investigate hiring a private visitor. This person would be a professional who is trained to work with dementia patients and it would be comfortable. You could explain her to be whoever makes sense and have her come in regularly if things go well.
I suppose you could look into Senior Seniors as well, but I would explore how he might fit in there. You might also check with a Memory Care facility to see what if any plans they may offer from occasional respite care, say for the day, while you get some rest.
I would immediately implement measures so that he does NOT have the opportunity to invite strangers into the house. How would he do this? I take it that he is not able to handle the phone or be in charge of greeting people at the door. That would be important for safely reasons.
And he joined a golf league sponsored by a rehab center for persons with handicaps. They only played 9 holes. The course reserved a long period of time for them so they didn't have to rush. A volunteer rode in the cart with each participant. The rehab staff came around to be sure people were drinking water. This group included young people, seniors, men, and women. It was the highlight of each week every summer for as long as he could do it.
I hope you can find some activities that are suitable and match your husband's former interests. Being with other people and having fun is very satisfying, even if verbal communication is limited.
It sounds like you would do well to make and carry some messages on a business-card sized paper. The ones I used (when we travelled) said, "Thank you for your patience. My husband has Lewy Body Dementia." Yours might mention that your husband is very social. You could hand this out instead of giving a phone number. And also in any situation where unpredictable behavior will be an issue. Hand it to the waitress, for example. It is truly amazing how patient and accepting people usually are when they know the situation.
My husband went to an adult day health program a few days a week. That allowed him to interact with other adults. He enjoyed it when people brought in vacation pictures, for example, and he brought in a slide show of his vacations. The program directors were extremely good about doing the entire narration or involving the vacationer as much as possible by asking questions. Every one got to feel like they were communicating. I think this kind of "sheltered" social environment can be very satisfying.
Call your local ALZ office and learn if there are any social programs available in your area. Here there is a "coffee house" specifically for those with dementia. It is new since my husband died, but this is the kind of thing worth knowing about.
I like your idea for outings. And if you carry the explanation cards I think you need not be so concerned about encountering strangers. You can wrap up any conversations he can't finish on a high note.