In the early 2000s, promoters became worried as attendance decreased dramatically at many circuit events. This decline in attendance was attributed to several factors. The original circuit audience that began attending the circuit parties of the '80s and '90s had grown older and no longer had such an active interest in multi-day partying. The communal experience of HIV/AIDS changed in the context of the availability of more effective treatments. In addition, all-gay cruises, which attract upwards of 1,500 passengers, have had a dramatic impact on the attendance at circuit parties.