"I’m drinking a Bud Light, and if they get into the act, will switch to Coors." Busch has definitely been a sponsor in the past:
BEER-DRINKING HOMOSEXUALS: Anheuser-Busch, determined to conquer the market for beer-drinking homosexuals, sponsored for the second consecutive year San Francisco's Folsom Street Fair. On a video of the fair made by conservative groups, behind naked men and women whipping one another until they bled were signs for Budweiser and Bud light. Americans for Truth About Homosexuality and the Family Policy Network have asked Anheuser-Busch to stop its sponsorship of homosexual events.---Link
As for Coors, they hired Mary Cheney to be their outreach to the gay community. You can read about it here: http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=18343