Some drugs alter consciousness, open the aura and make one more sensitive to psychic vibrations. I do not recommend that you experiment with drugs. Alcohol can be very dangerous, especially if you are already too sensitive. It leaves a psychic residue that lasts up to 24 hours. Remember to raise white light when you enter a pub or bar, or when you visit anyone with a drinking problem.
Bars are usually full of lower astral energies, the emotional imprints of their clients.
If you are having vibrational sensations or anxiety attacks, abstain from drugs and alcohol completely. Developing sensitivity should not be a problem. The opposite is usually the case. Alcohol, strict vegetarian diets, celibacy and excessive mediation are frequently behind over-sensitivity. Tobacco is very grounding, but it's effects are temporary, and it leaves one more sensitive when it wears off.