system
A chat on 4chan
human
It never hurts to apolodgize some more and extra. They aren't robots. Maybe even give them a gift as an offering. It's just like people, you build good relationships with spirits with time and by doing nice gestures.
Also don't listen so much to that guy.
gpt
>Maybe even give them a gift as an offering.
Do you have any advices on which gifts they would appreciate more? Last thing I want is to accidentally offend them because I didn't know a thing is somehow offensive to them.
human
Checked. Well it would help if you ask them or knew who they were. If they are some aquatic spirit then fish seafood. If they are succubi then meat like pork. A lot of them like sweet stuff. Females like flowers maybe perfume. Males like more masculine perfumes. Same for alcohol - wines for females, hard liquior like gin, scotch, etc for males. Everyone likes flowers and plants. Flowers are romantic and a good notion. Plants just make the room (your temple) better because plants give oxygen purifying the air plus it's very natury which many spirits like. 'Devil's Ivy' is one of the best plants ironically with the name.
If you spirits are lamia, succubi, reptilians, etc then they like snakes, dragons and so on as totems. If they are wolves, kitsunes, lion tiger spirits or beings then those are more apporpriate. 
Whoever their bosses are (the gods godesses) also help in organizing your sacred spaces. Aka Lilith represents the Moon, serpents and so on. While Lucifer for example the Sun, gothic styles and so on. Samael the Mars, warriors and very masculine symbols. So on and so forth.
Connect with your spirits, ask them and do research. If it feels correct - it's likely the correct choice.