Hello and hope all is well with you today.
As for these three great cities in the US:
1. Clearwater Beach has an occupancy rate in 2014 of 90 percent as reported by the TBN Weekly:
For the more popular neighborhood in Clearwater Beach, try looking at Island Estates and Sand key beach
2. Washington DC has an occupancy rate in 2014 of 63.4 percent. as reported by hospitality.net:
For the more popular neighborhoods in DC, try looking Georgetown, Dupont Circle, Logan Circle, as well as the west end.
3. Anaheim has an occupancy rate of 79.3 percent as reported by the visitors authority.
As for the more popular neighborhoods, look at Anaheim Hills, Platinum Triangle as well as West Anaheim.
For your last part of the question about two popular cities in Hawaii, Honolulu and Lahaina are popular among visitors.