Skanda Purana — Brahma Khanda, Shloka 27
न दुर्जनसमाकीर्णे न शूद्रश्वापदावृते । देशे न द्यूतसदने वदेत्पुण्यकथां सुधीः
na durjanasamākīrṇe na śūdraśvāpadāvṛte | deśe na dyūtasadane vadetpuṇyakathāṃ sudhīḥ
智者不应在恶人拥挤之处宣说功德圣传；也不应在被贱民与野兽充斥之地，或在赌馆之中讲述。
Narratorial Purāṇic voice (context not explicit in the snippet)
Scene: Two contrasted spaces: a serene temple courtyard with lamps and seated listeners versus a noisy gambling house with dice, quarrels, and shadowy figures; the wise narrator chooses the former.
FAQs
The fruit of kathā depends on the sanctity of the setting; avoid places dominated by adharma and distraction.
No particular tīrtha is named; the verse contrasts unfit places with appropriate sacred venues.
A venue restriction: do not conduct Purāṇa-kathā in gambling houses or in places associated with adharma and danger.