I study in Boston, and I am a frequent clubber at both gay and straight clubs. Every Sunday, as mentioned above, Avalon, the biggest club in Boston, located on "Club Street" Landsdowne Street next to Fenway Park, is gay night and unfortunately for many, 21+. Hence it tends to attract a slightly more mature, mainly male audience as most college students are not of age.
On Thursday, it is International Night at Avalon, with a mix of Latin, European and techno mixes. It draws a largely international crowd and high fashion (and black) is the theme of the evening. It is 19+ on Thursday nights and many local college students go.
On Friday, it is Avaland at Avalon, with visiting DJs. The crowd is much the same, a bit less international (more white) sometimes and the age limit I think varies between 19+ and 21+ depending on the type of music played.
Saturday is 21+ and seems many top international DJs like Paul Oakenfold and DJ Manolo. I've never been to Saturday Avalon nor Sunday Gay Night.
However, my frequent gay clubbing experiences has to be at Axis (next door to Avalon) on Monday nights (18+ I think), which attracts MANY young freshmen and college students from nearby colleges, namely Boston University (the BU campus is on the doorsteps of Landsdowne Street), Harvard, UMass Boston, MIT and Tufts (my school!). There are 20+ universities in the Boston metro area and you can be SURE to see lots of local gay college students checking out the club scene. Although Monday night is a "school night" many of us take a few hours off our "busy studying routine" to have some fun and alot of guys gather at IHOP near Landsdowne for some after-club grub at 2am (oh yeah Boston clubs close at 2am, sucks huh!).
Hmm, what else. Thursday is Campus at ManRay in Central Square, in between MIT (Kendall Square) and Harvard (Harvard Square). Campus on Thursday features 19+ crowds, more variety (more Asians like myself actually) in guys and gals and two dance floors, one more retro, the other more house, hip-hop and techno along with latest Top 40s.
In any case, college students make club life FUN in Boston
Now that I'm 21, I can go to Avalon on Sundays. Now I have to find friends that are old enough (most of my gay friends are 19 or 20).
Anyway, gay clubbing is fun, some of my straight friends like it (mostly girls).