When people ask me if I'm musical, and I tell them I play the recorder, that invariably prompts two questions: "Which one do you play?" and "Do you play in a group?". The answer to the first is: descant, treble, tenor and sopranino. The second is less easy to answer, as it all depends on what you mean by a group.
I belong to the Devon Society of Recorder Players. What that means in practice is that I go along to their monthly meetings when I'm free and sightread one part of a piece of music. Three years ago Devon SRP set up a separate "Exeter Recorder Orchestra". It is supposed to be distinct from the main SRP in that its stated aim is to practise (not just sightread) a selection of pieces with a view to performing them. But in the event we have given only three concerts during all this time, pretty poorly attended at that. And we only meet once a month, so on the face of it it doesn't seem that different from Devon SRP. Most of the other members of Devon SRP and/or ERO play in smaller groups, some with other instrumentalists. At the very least this means meeting up in other people's houses, but some of these smaller groups have also given performances. I once spoke to someone who'd played in a group in mediaeval costume who provided background music at Buckland Abbey (a National Trust property on the other side of Dartmoor). Unfortunately groups such as this don't have auditions as such. It's more about playing with friends, or friends of friends. Indeed this person's advice to me was to make myself known, invite people back to my flat to play ensembles and maybe this just might lead to greater things. I objected, saying that my flat was far too small and untidy, and besides I only have a very limited collection of consort music. Another issue is that I hardly know the names of anyone in the SRP and/or recorder orchestra; I've probably been told any number of names but it's dificult to retain the information if I don't see the other person for another month at least. And this is after four years in Exeter. Having Asperger's syndrome (which I do) probably doesn't help either.
There's a lady at the Quaker meeting I attend who's had recorder lessons. When I once suggested that we should play together some time (emphasis on play, not perform) she was totally against the idea, saying that "You're far too good for me - you play in a group?" Eh?! This despite the fact she has never heard me play a note. There are people like that lady among my office colleagues, people who've never bothered to attend my once-in-a-blue-moon concerts and yet who still think I'm really good. Maybe I should take it as a compliment and leave it at that, but I am a tad tempted to grab them by the shoulders and say "If you think I'm so marvellous why have you never come to hear me play?"
Not all my colleagues are like that. My closest colleagues (as in my team mates, not close in any social or emotional sense) know nothing about my life as an amateur musician. Well I can only suppose they know nothing. In all the time I've worked with them (nearly 3 years) I could count on the fingers of one hand the number of times they've asked me how my weekend was.
You seem like just the person to get things going...! It seems many people enjoy charity concerts at village halls / parish halls / school halls etc. There must be enough like-minded musicians in your area who are keen to do concerts, and have a lounge / dining room large enough to practise in. The key here seems to be identifying and connecting with such people, however long it takes. Much can be learned from musicians you admire, by watching how they building a support base. Possibly you would consider doing a teacher's course? Then, in due course, you could hold pupils' concerts. Happy recorder playing!