Buddhist Studies and Pali Language
The universities of peradeniya (http://arts.pdn.ac.lk/pali/) and kelaniya (http://kln.ac.lk/humaniti...) offer variety of buddhist studies, and pali language courses in english.
Mahamevnawa Meditation Monastery
Is a good place to learn true buddhism.
Meditation
You may find monasteries and meditation centres that offer meditation courses generally free of charge in the buddhist publication society guide lanka_monasteries_2008_jan.pdf.
Dancing
There are many foreign enthusiasts to learn sri lankan traditional dance under three categories which are udarata, pahatharata and sabaragamu. and there are distinguished drumming for those categories.