1 Football viewing centre:
Football viewing  centre is great place to gist and argue with people. It is also a common place were majority of guys make friends.
Viewing centre can serve as a place to promote your products.

2 GYM:
GYM is also a good place to make  friends and promote what you sell.

3 Conferences:
Conference is also a great centre establish connection and meet with new people.

4 School: Either at secondary school level, diploma, HND, undergraduate, BSC., Masters, HND etc. You will likely make friends with some of your colleagues this can also be centre to promote your products.

Read more:
PLACES TO MEET CUSTOMERS PURCHASE YOUR PRODUCTS. https://www.sanwomi.com/2018/12/places-to-meet-customers-purchase-your.html