One of the reasons I loved being a scientist was because there was always a fume hood in the lab. Just back up and casually lean against the fume hood and let 'er rip. The exhaust fans are also loud, so takes care of the noise problem as well.
My least favorite place to fart is in a racquetball court. Totally enclosed area, only two people playing, echoes badly. There's no blaming it on someone else in a racquetball court. The other person knows it wasn't them. If any of my opponents were under the impression that ladies don't fart, they aren't any longer. Sometimes, if there is time, I will wander over to the squash court and deposit my air biscuit there. Let those snobby squash players deal with it!