There are some Churches that allow gays in their worship service. I cannot say if they allow gays to have baptism or last supper rites but one Church did cause a big attention getter by not allowing last supper rites to an avowed lesbian whose mother funeral service was being held.
Recently the Episcopal Church has announced July a Liturgy for Same Sex unions. It is called a blessing and some in the Episcopal Church have announced that they will not do the blessing.
"The United Church of Christ, which voted in 2005 to support marriage for same-sex couples, already has rites for blessing such unions. But it does not have one official version for the entire church, because the denomination is more decentralized than the Episcopal Church."
It will be interesting to see other Churches handle the gay issue. I do know that in Glendale the Episcopal Church is doing outreach to gay, people with HIV and also has an outreach for homeless. The number of Episcopalians has decreased from 2.3 million members to 1.9 million members (due to falling attendance and the gay issue).
Even the gays in Los Angeles County Jail have Christian services for gays. Basically everything is a bit chaotic and we need updates like this.