Pretty standard, I suppose.

Marching Band
Winter Drumline
Snare Ensemble
Honor Band
Symphonic Band
Show Band/Jazz Band
Musical Pit Orchestra (Forced to )
Regional Band
Private Tutor (Drumset and Marching)

Haha, oh wow. Some of the things I forgot to list then. After seeing everyone's vastly expansive lists...it made me feel lesser haha.

But nonetheless, I need to update my list with some other mentionable involvements that I remembered after seeing all you people post. Haha. Here we go...

Mine are:
Marching Band (class)
Jazz Band (class)
Percussion (class)
Winterline (activity I guess you can say?)
+Solo&Ensemble
+Wind Ensemble (play with them at concerts; the advanced group)
+Symphonic Band (play with them at concerts; not a lot though)

You guys are so lucky to have a strictly percussion class, and to have someone capable of teaching a percussion class. I hate my high school.

Marching Band (class)
Wind Ensemble (class, the better band)
Choir (class, only do percussion when needed)
Music Theory (class)
Jazz Band (class)
Music Appreciation (class, I didn't know what else to take)
A+ Tutoring with the Middle School Band
Musical Pit ("Seven Brides for Seven Brothers" and "Guys and Dolls")
Winter Drumline
Percussion solo's and Ensembles
District Bsnd
Community Band

I also take private lessons, as well as give them to middle school kids and underclassmen.

Mine are as follows:
Pride Band
Jazz Band
All-Region Band
AP Music Theory

Basically all of the band classes we have at my high school, haha.