This onsen is open for people with tattoos too.
Let's go to hot spring after sweating a little bit from some light exercise.
Neither my dad nor mom likes hot springs.
A warm spring (like the water kind of spring) is a hot spring. These are really nice. You should go to them in Japan.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.