[X] Buffy knows that Harmony always loved going to the beach, and that's obviously been a non-option for her this summer. But they could go at night, and it'd be pretty private. It's not like either of them have to worry about drowning.
[X] Harmony got ticket to some demon sporting event in LA. Buffy does not care what they do, but wearing nice dresses and getting some free drinks sounds fun. Buffy can even scout some of the demons for the movie.
[X] Cordelia scored a starring role in a big horror movie, and they want to do shooting in Sunnydale. It could be great for the city's publicity, and might provide work for peaceful demons in the city. What's the catch? Buffy's still popular in Hollywood, and she might have to do a cameo role.
[X] Harmony always likes to patrol. It's not exactly a novel activity, but familiar can be good. Buffy does happen to know about a few secluded spots in graveyards, too.