The relevance of the president (educated at two universities with large LGB populations) to Grinnell’s dating opportunities for queer students eludes me. Grinnell has a small population of male students (~750) and is located in a rural area, both of which are significant disadvantages for a gay guy looking to date or socialize. Acceptance is not the issue at stake here; a critical mass of out G/B students on campus is. Grinnell may be a good option (the number of LGB-related groups suggests it’s at least decent), but any rural LAC requires closer examination than larger or more urban colleges, particularly if you’re a gay person of color.
Urban colleges like Macalester, Lewis & Clark, and Reed are some of the best choices among LACs, and Minneapolis and Portland are awesome cities for gay people. Due to the consortium, the Claremonts have a good-sized queer community as well. Vassar and Bard have some of the largest gay populations among LACs (I have friends who’ve graduated from both and can verify).
The best source of information is current students on campus. Get in touch through the LGBT centers and/or gay-straight alliances on campus.
http://www.lgbtcampus.org/find-a-lgbt-center
You might want to look into Swat or Haverford if you have the stats. Neither has a huge gay population, but Philly is very gay-friendly, and there’s plenty of college students around. Wesleyan is a good bet as well.