tupakoinnille
Tupakoinnille is the allative form of the Finnish noun tupakointi, meaning smoking. In Finnish, the allative case marked by the suffix -lle expresses direction toward something, a recipient, or a designated domain. When tupakointi is used with this ending, tupakoinnille typically signals an area, measure, or provision intended for the activity of smoking, or something assigned to smoking as its purpose or target.
In usage, tupakoinnille is common in formal or regulatory language and in descriptions of spatial arrangements.
Notes on nuance: tupakoinnille emphasizes the domain or purpose associated with smoking, rather than the act
See also: tupakointi, allatiivi and allative case in Finnish grammar, Finnish regulatory language.