Some days it's too wet to get outside on real rock and some days climbers just can't make it to the crag. Some are lucky enough to live near craggy hotspots but even then it can be hard to fit work, family life, and climbing into a single day or weekend. The indoor climbing gym is always an option but if you've got sturdy doorframes you can also hang fingerboards and bring the gym into the house.
Metolius Bouldering Set Greatest Hits BOUL312
Metolius Rock Rings 3d Training Hangboards ROCK002
Metolius Super 7 Set Greatest Hits - 7 Pack SUPE307