Dear Sri Ganesh65
Sorry I did not make it clear that by "place of wedding" I meant town, village, etc, away from the metropolis of Chennai. The lagnam changes with the geographical location, as you will agree. For example, sunrise at Chennai will not necessarily be in the same lagnam as sunrise at Kochi. Or at Pudukottai, or Palani.
As for hotels, mandapams, etc. (and places other than brides' parents' homes), pariharams to neutralise sthala-dosha might well consist of doing punyaaha-vaachanam. I have observed this being done.
S Narayanaswamy Iyer