ANAHEIM – Gay Days likely will once again attract thousands of visitors to Disneyland this weekend as the event that isn’t officially sanctioned by the theme park adds high-profile entertainment during its 15th year, which begins Friday.

Gay Days Anaheim runs Friday through Sunday at Disney’s two parks and surrounding venues. There will be a series of parties and entertainment, including previews of TV shows such as ABC-TV’s “Nashville.”

Organizers say about 30,000 people usually visit the resort for Gay Days, but that is only an estimate: There is no registration, except for specific events, said Eddie Shapiro, producer of Gay Days Anaheim. Some participants just show up for the day.

An indication that Gay Days is heavily attended: A block of Disney hotel rooms booked for the event doubled in size this year – up to 2,000 rooms, Shapiro said.

Karmin, a duo that recently won a back cover of Rolling Stone, will perform Saturday night at House of Blues Anaheim in Downtown Disney. Actress Florence Henderson will speak at a Sunday night charity event for Broadway Cares/Equity Fights AIDS.

While Disney does not sponsor the event, the company accommodates any large group, said Suzi Brown, a Disneyland Resort spokeswoman. Disney quietly cooperates with Gay Days, such as by selling meal packages with rainbow Mickey cookies.

Gay Days started in 1998 with 2,500 people unofficially gathering in Disneyland. Groups had protested and boycotted Disneyland, saying the event was not family-friendly. But large-scale, organized protests have been absent for several years.

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