1. Know your roommate's preferences: Before choosing the way to celebrate, know your roommate's preferences for milk tea or other foods. If they like milk tea, it is a good choice to invite them to drink milk tea.

2, consider the budget: according to your budget, choose the appropriate way to celebrate. If your budget is limited, it is an economical and popular choice to invite your roommate to drink milk tea. If the budget permits, you can also consider inviting roommates to restaurants or take-out dinners.