There are three Lions clubs in the Missoula area that meet regularly on different days (except holidays), at different times, and at different places:
Missoula area clubs
Missoula (Downtown) Lions Weekly Monday 12 – 1pm
Southside Lions Weekly Wednesday 7am
Lolo Lions 2nd & 4th Thursday 5pm
So there is a Lions club for you. See their pages above for more details.