I thought I would take this discussion to a practical level. PRACTISE !!
I bring my flute to the ladies bathroom to practise at lunchhour as nobody ever goes there. 
Where do you take yours?
I play in the lunch area in front of my office building. And yes, it is my office building - being a taxpayer Iām sure Iāve paid for it several times over.
Eric
Eew. Where do they āgoā, if not in the bathroom?
Second thoughts, forget I asked that questionā¦
I go to our anechoic chamber, or our reverberant room, depending on my moodā¦ I will have to play VERY loud to be heard outside them. Unfortunately the air is very dry (<10% sometimes) which is less good.
/Anders, acoustics researcher
I play in the ladies bathroom as the Acoustics are really good.
My class goes to gym every morning, so I can just close the classroom door and play for 45 minutes.
Mark
In front of the fountain in the courtyard between buildings. Or on a
bench along the little greenway path behind the officeā¦ though that
buts up against a neigborhood of houses that are still being built, so
Iāll probably have to stop when theyāre occupied. It was warm enough
yesterday that I played guitar by the fountain after work. I love NC.
I havenāt brough it to work yet, but when the weather gets better, Iāll practice in the park, by the canal or the river.
I have just come back from the lunch and, of course, flute practise in the toilet.
Practised a tune or two in front of the mirror in the ladies toilet.
When it gets to 1.55pm, the ladies come in to wash their teeth etc. so thatās when I leave. Can only put in about 10-15mins at work but thatās ok with me.
Lovely acoustics!!!
Iām retired. Heh, heh, heh!
I have a job at homeā¦handy, huh? 
berti
I donāt have time to practice at work. I spend too bloody much of it reading C&F ! 
i only have mine in work on the day of my lesson & i have an hour & a half to spare after work before the lesson starts, if thereās no-one around i practice at my desk, but i wont play in front of people - not even the cleaners when theyāre hoovering. gonna spare people the pain for another few months til i can actually play, rather than sounding like a 7 year old learning ātwinkle twinkle little starā on the tin whistle for the 1st time!
I work on a college campus so I just go to a practice room in the music building. Plus, itās a good excuse to take a walk. 
I have a lab in the basement of the building where I work that I could play in, but Iām pretty sure that it would be loud enough to bother people in nearby offices.
You know, I used to go to the practice rooms on campus, but theyāre rather limited in number, and Iād get dirty looks from the ārealā musicians whenever I went, so I stopped. I just play in my room, now, when my roommate is gone. The walls are very good at blocking the sound, and Iāve not gotten any complaints.
When I lived briefly in a hostel , I found an electrical switch room in the basement to practice in. Not very salubrious but better than outside in winter. The car is good too, but in English-speaking countries you have to sit in the passenger seat.
Donāt forget you can reduce the volume of sound produced by your flute or whistle if forced to practice in sensitive areas. Just put a blob of Blutack on the outside of the flute opposite your lip, just beyond the āedgeā. The size of blob and how close to the edge will determine how much sound will be produced. Not as much fun as full-throated playing, but perfectly adequate if thatās all circumstances will allow.
Terry
Are you saying we donāt speak English in the USA or Canada? 
And what about lefties?
Or American Lefties?
We donāt just live in Dublin you know!!!
I donāt play at work, but I had a great time playing in the hotel stairwell when I was at a conference last fall. Great ringing acoustics!!!
Mary
You guys have really opened my eyes to just how reserved and shy Iāve been (stereotypes, Iād spit on themā¦ if only my upper lip wasnāt so stiff) It has genuinely never occurred to me that I could practice during a working day. Then again, the english stereotype could be used against itself - if I play, no one will have the nerve to tell me to stop. They will of course hate me and tell all their mates about the incredible din they heard, but next day Iāll hear either nothing or a great compliment on my playing. Result!