My mother made me sit in a chair in a boring spot as a time out. I made my children sit on the stairs as a boring location for a time out.
Bathroom seems ripe for mischief and the bedroom seems too fun. Agree with clear rules and immediate consequences.
My children are now young adults and we have a loving close relationships and I was able to also enjoy them when they were younger because they generally behaved themselves. Neither EVER hit me or my husband or even each other.