I go to reformer Pilates about 3 times a week. It's a small studio with only 10 reformer beds so I seem the same faces regularly and know all the instructors on a nod and say hi type basis.
There's one participant who has always brought her dog to the class. She walks her on the way there, I guess. The dog just sleeps in a corner, near the door, about 5 metres from the class.
However more and more people are starting to bring their dogs. On Mondays class, the instructor had two poodles (also near the door), and two participants had dogs next to their reformers, one at each end of the room (which is about 10 metres x 10 metres)
They're not really bothering me, I suppose. I'm a bit allergic but if I don't stroke them then I don't sneeze (whereas I couldn't be in the same room as a cat). But I just find it really annoying. All the instructors seem to love them and one was taking selfies with an enormous bull mastiff the other day.
I've got a great, cheap membership because I signed up when the studio opened. Loads of the instructors are excellent, so I don't want to go elsewhere. Should I say something and risk bad feeling?