A Letter of Invitation

Letters of invitation can be formal or informal depending on the situation and who we are writing to. They usually contain some additional information, for example: latest news, description of the event (party, wedding, etc.) place (hotel, house, etc.) and/or directions to the place.

Лист-запрошення може бути офіційним і неофіційним, залежно від  ситуації і адресанта. У зазначеному типі листів зазвичай міститься додаткова інформація: останні новини, опис події (вечірки, весілля тощо), місця (готель, будинок тощо) та опис шляху до цього місця.

Структура:
1. Introduction: Reasons for writing the letter. Причина написання листа. 
Formal:
We would be honoured if you
I cordially invite you to
Your presence would be appreciated at
You are invited to attend, etc.
Informal:
I'm writing to invite you to ...
I'd love it if you could come to
We're organising a ... and would love it if you could come, etc.
2. Details of the event: what is it devoted to. Деталі заходу: чому він присвячений. 
3. Description of the place. Опис місця проведення.
4. Directions to the place. Опис, як туди дістатись
In case you don't know the way,
I'll give you some directions
I have included some directions
Here are a few directions so you don't get lost
In case you do not know the exact location of the ..., etc.
5. Closing Remarks. Завершення листа
Formal:
We would be grateful if you could
Please indicate whether you will be able to attend, etc.
Informal:
I hope you'll be able to make it
Hope you can come
Looking forward to seeing you then
Please let me know as soon as possible, etc.
6. Full Name / Name

SInformal Letter of Invitation

Source: Successful Writing

Task 1.
You are going to celebrate your 18-th birthday at Feride Plaza next Friday. Invite your friend to the party. Don't forget to  explain how to get there from his or her house.

Task 2.
Your class is going to celebrate the 10th anniversary of your graduation at the "Velur". Invite your class mistress. Give her the directions how to get there.