Google Image Search

sometimes when you search for "chakras" with google images, sometimes you get this.

from this website

Iyengar Yoga Joke

Q. How many Iyengar yogis does it take to replace a light bulb?
A. Only one !

BUT, they will need:
a sticky mat
a backless chair
two blocks
five blankets
a bolster
six ropes
two belts
six assorted benches
a bandage
a slant board
two quarter rounds
three weights
one wooden horse
a certificate

Adorned By Moonlight: Prayer of the Great Bliss Queen

subdue the vagaries of mind. excellent.

Question and Answer

Question (from c):
Just wondering from other peoples experiences.... is it good/bad to use yoga as a vice?
I think its what I might have been doing last month (though there was also a 30 day challenge going on at the studio) and things were great! I was feeling so good.
but I'm taking some time away from the studio this month with work/school/moving and my life seems to be falling apart.

Short answer:
We call it a daily practice. It is no more a vice than brushing your teeth. Try not brushing your teeth for a month, and see what happens.

Longer Answer:

This is where the buddhists really seem to have some insight that isn't felt as fully in the yoga community.
For the buddhists, the purpose of practice is the relieve the individual, and all beings everywhere of the suffering caused by the neurotic, conditioned mind. That is pretty much the whole deal. there is no promise of a 'yoga butt', no promise of a stronger back, or more flexible hips. It focuses on the fact that we are tortured by our minds, all of us, and the only way out is through consistent practice. The mind can be your best friend or your worst enemy. If you don't take serious time to train it, it will probably be the latter.

Patanjali says something similar too, in Yoga Sutra 1.14

When yoga practice is done for a long time, without a break, and with sincere devotion, then the practice becomes a firmly rooted, stable and solid foundation.
(sah tu dirgha kala nairantaira satkara asevitah dridha bhumih)

If you can't go to class, i suggest taking 10 minutes and doing just a little bit on your own. nothing extreme, just a warm up, a sun salutation or two, just to keep it loose.