Marijuana and Massage

I just received my LMT paperwork and i began seeing a few people at their homes as clients. One woman, when i arrived at her house asked if it would be ok if she smoked some marijuana before her massage.

I had no problem with her smoking it, (it's her body, it's really not my business she puts in it) Having almost no experience, was wondering if it was a common thing to find in the private massage setting?